diff --git a/app/controllers/boards_controller.rb b/app/controllers/boards_controller.rb
index ceb63d7b0..099e9404a 100644
--- a/app/controllers/boards_controller.rb
+++ b/app/controllers/boards_controller.rb
@@ -161,6 +161,7 @@ class BoardsController < ApplicationController
           if @project
             render :action => 'show', :layout => 'base_projects'
           elsif @course
+            @left_nav_type = 2
             @params=params
             render :action => 'show', :layout => 'base_courses'
           end
@@ -185,6 +186,7 @@ class BoardsController < ApplicationController
     @board = @project.boards.build
     @board.safe_attributes = params[:board]
     if @project.project_type == 1
+      @left_nav_type = 2
       render :layout => 'base_courses'
     end
   end
@@ -206,6 +208,7 @@ class BoardsController < ApplicationController
 
   def edit
     if @project.project_type == 1
+      @left_nav_type = 2
       render :layout => 'base_courses'
     end
   end
diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index e8a08803c..41ea9c45e 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -907,6 +907,7 @@ class CoursesController < ApplicationController
     end
     @type = params[:type]
 
+    @left_nav_type = 1
     respond_to do |format|
       format.js
       format.html{render :layout => 'base_courses'}
@@ -938,6 +939,7 @@ class CoursesController < ApplicationController
       end
       @jour = paginateHelper @jours,10
       @state = false
+      @left_nav_type = 6
       respond_to do |format|
         format.html{render :layout => 'base_courses'}
         format.api
@@ -1121,6 +1123,14 @@ class CoursesController < ApplicationController
     end
   end
 
+  #统计
+  def statistics_course
+    @left_nav_type = 9
+    respond_to do |format|
+      format.html {render :layout => 'base_courses'}
+    end
+  end
+
   private
   def update_quotes attachment
     if attachment.copy_from
diff --git a/app/controllers/exercise_controller.rb b/app/controllers/exercise_controller.rb
index c3964c567..e3caaf9fb 100644
--- a/app/controllers/exercise_controller.rb
+++ b/app/controllers/exercise_controller.rb
@@ -29,6 +29,7 @@ class ExerciseController < ApplicationController
       exercises = @course.exercises.where("exercise_status <> 1").order("created_at asc")
     end
     @exercises = paginateHelper exercises,20 #分页
+    @left_nav_type = 8
     respond_to do |format|
       format.html
     end
@@ -72,6 +73,7 @@ class ExerciseController < ApplicationController
     end
     # @percent = get_percent(@exercise,User.current)
     @exercise_questions = @exercise.exercise_questions
+    @left_nav_type = 8
     respond_to do |format|
       format.html {render :layout => 'base_courses'}
     end
@@ -118,6 +120,7 @@ class ExerciseController < ApplicationController
   end
 
   def edit
+    @left_nav_type = 8
     respond_to do |format|
       format.html{render :layout => 'base_courses'}
   end
@@ -159,6 +162,7 @@ class ExerciseController < ApplicationController
     @exercise = Exercise.find(params[:id])
     exercise_questions = @exercise.exercise_questions
     @exercise_questions = paginateHelper exercise_questions, 5
+    @left_nav_type = 8
     respond_to do |format|
       format.html{render :layout => 'base_courses'}
     end
@@ -379,6 +383,7 @@ class ExerciseController < ApplicationController
     else
       @exercise_users_list = []
     end
+    @left_nav_type = 8
     respond_to do |format|
       format.html
       format.xls {
@@ -566,6 +571,7 @@ class ExerciseController < ApplicationController
     eu = get_exercise_user(@exercise.id, @user.id)
     eu.update_attributes(:score => score)
     @exercise_user = ExerciseUser.where("user_id =? and exercise_id=?", @user.id, @exercise.id).first
+    @left_nav_type = 8
     respond_to do |format|
       format.html {render :layout => 'base_courses'}
     end
diff --git a/app/controllers/files_controller.rb b/app/controllers/files_controller.rb
index f06725d01..ed2b2ebfa 100644
--- a/app/controllers/files_controller.rb
+++ b/app/controllers/files_controller.rb
@@ -366,6 +366,7 @@ class FilesController < ApplicationController
 
       @tag_list = attachment_tag_list @all_attachments
 
+      @left_nav_type = 5
       render :layout => 'base_courses'
     elsif params[:org_subfield_id]
       if params[:sort]
@@ -445,6 +446,7 @@ class FilesController < ApplicationController
     @versions = @project.versions.sort
     @course_tag = @project.project_type
     if @project.project_type == 1
+      @left_nav_type = 5
       render :layout => 'base_courses'
     end
   end
@@ -812,6 +814,7 @@ class FilesController < ApplicationController
       @attachtype = params[:type].to_i
       @contenttype = params[:contentType].to_s
      # render layout:  'base_courses'
+      @left_nav_type = 5
       respond_to do |format|
         format.js
         format.html {
diff --git a/app/controllers/homework_common_controller.rb b/app/controllers/homework_common_controller.rb
index 6724f42bb..2020915f8 100644
--- a/app/controllers/homework_common_controller.rb
+++ b/app/controllers/homework_common_controller.rb
@@ -39,6 +39,7 @@ class HomeworkCommonController < ApplicationController
       end
     end
 
+    @left_nav_type = 3
     respond_to do |format|
       format.js
       format.html
@@ -60,6 +61,7 @@ class HomeworkCommonController < ApplicationController
     @is_in_course = params[:is_in_course].to_i
     @course_activity = params[:course_activity].to_i
     if @is_in_course == 1 || @course_activity == 1
+      @left_nav_type = 3
       respond_to do |format|
         format.html{render :layout => 'base_courses'}
       end
diff --git a/app/controllers/messages_controller.rb b/app/controllers/messages_controller.rb
index 160383e92..fae350a6a 100644
--- a/app/controllers/messages_controller.rb
+++ b/app/controllers/messages_controller.rb
@@ -124,6 +124,7 @@ class MessagesController < ApplicationController
 
         end
       else
+        @left_nav_type = 2
         respond_to do |format|
           format.html {
             layout_file = @project ? 'base_projects' : 'base_courses'
@@ -241,6 +242,7 @@ class MessagesController < ApplicationController
           if @project
             layout_file = 'base_projects'
           elsif @course
+            @left_nav_type = 2
             layout_file = 'base_courses'
           elsif @org_subfield
             @organization = @org_subfield.organization
diff --git a/app/controllers/news_controller.rb b/app/controllers/news_controller.rb
index 76b229dbf..190c3852b 100644
--- a/app/controllers/news_controller.rb
+++ b/app/controllers/news_controller.rb
@@ -56,7 +56,7 @@ class NewsController < ApplicationController
                          :order => "#{News.table_name}.created_on DESC",
                          :offset => @page * 10,
                          :limit => 10)
-
+      @left_nav_type = 4
       respond_to do |format|
         format.html {
           @news = News.new # for adding news inline
@@ -136,6 +136,7 @@ class NewsController < ApplicationController
         @newss = paginateHelper @newss,@limit
 
         #@newss = paginateHelper scope_order,10
+        @left_nav_type = 4
         respond_to do |format|
           format.html {
             @news = News.new
@@ -176,6 +177,7 @@ class NewsController < ApplicationController
     if @news.course_id
       @course = Course.find(@news.course_id)
       if @course
+        @left_nav_type = 4
         render :layout => 'base_courses'
       end
     elsif @news.org_subfield_id
@@ -279,6 +281,7 @@ class NewsController < ApplicationController
       @organization = @org_subfield.organization
     end
     if @course
+      @left_nav_type = 4
       render :layout => "base_courses"
     elsif @org_subfield
       render :layout => 'base_org'
diff --git a/app/controllers/poll_controller.rb b/app/controllers/poll_controller.rb
index e4cf31f55..ad04e68fa 100644
--- a/app/controllers/poll_controller.rb
+++ b/app/controllers/poll_controller.rb
@@ -15,6 +15,7 @@ class PollController < ApplicationController
         polls = Poll.where("polls_type = 'Course' and polls_group_id = #{@course.id} and polls_status = 2")
       end
       @polls = paginateHelper polls,20 #分页
+      @left_nav_type = 7
       respond_to do |format|
         format.html{render :layout => 'base_courses'}
       end
@@ -25,7 +26,7 @@ class PollController < ApplicationController
 
   def show
     @poll = Poll.find params[:id]
-    if @poll.polls_status != 2 && (!User.current.allowed_to?(:as_teacher,@course) || User.current.admin?)
+    if @poll.polls_status != 2 && !(User.current.allowed_to?(:as_teacher,@course) || User.current.admin?)
       render_403
       return
     end
@@ -44,6 +45,7 @@ class PollController < ApplicationController
       @percent = get_percent(@poll,User.current)
       poll_questions = @poll.poll_questions
       @poll_questions = paginateHelper poll_questions,5 #分页
+      @left_nav_type = 7
       respond_to do |format|
         format.html {render :layout => 'base_courses'}
       end
@@ -78,6 +80,7 @@ class PollController < ApplicationController
 
   def edit
     respond_to do |format|
+      @left_nav_type = 7
       format.html{render :layout => 'base_courses'}
     end
   end
@@ -112,6 +115,7 @@ class PollController < ApplicationController
     @poll = Poll.find(params[:id])
     poll_questions = @poll.poll_questions 
     @poll_questions = paginateHelper poll_questions, 5
+    @left_nav_type = 7
     respond_to do |format|
       format.html{render :layout => 'base_courses'}
     end
@@ -393,6 +397,7 @@ class PollController < ApplicationController
   #显示某个学生某份问卷的填写结果
   def poll_result
     @poll_questions = paginateHelper @poll.poll_questions,5
+    @left_nav_type = 7
     respond_to do |format|
       format.html{render :layout => 'base_courses'}
     end
diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index 45b54cf0a..4992501c5 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -526,6 +526,7 @@ class StudentWorkController < ApplicationController
     @is_focus = params[:is_focus] ? params[:is_focus].to_i : 0
     # 消息传过来的ID
     @message_student_work_id = params[:student_work_id]
+    @left_nav_type = 3
     respond_to do |format|
       format.js
       format.html
@@ -918,6 +919,7 @@ class StudentWorkController < ApplicationController
       ORDER BY absence #{order}")
     end
     @order = order == "desc" ? "asc" : "desc"
+    @left_nav_type = 3
     respond_to do |format|
       format.html
     end
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index f256d7a06..e01f3c734 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -949,6 +949,7 @@ class UsersController < ApplicationController
         @student_work = StudentWork.new
       end
       @course = @homework.course
+      @left_nav_type = 3
       respond_to do |format|
         format.js
         format.html {render :layout => 'base_courses'}
diff --git a/app/helpers/courses_helper.rb b/app/helpers/courses_helper.rb
index d1f4bfe97..42511f218 100644
--- a/app/helpers/courses_helper.rb
+++ b/app/helpers/courses_helper.rb
@@ -35,7 +35,7 @@ module CoursesHelper
          and (c.is_excellent =1 or c.excellent_option =1) and c.is_public = 1 and c.id != #{current_course.id} order by cs.updated_at desc;"
     default_ids = Course.find_by_sql(sql).flatten.map { |c| c.id }
     excellent_ids << default_ids.flatten
-    arr_result = excellent_ids.flatten.uniq.first(5)
+    arr_result = excellent_ids.flatten.uniq.first(3)
     excellent_courses = Course.find(arr_result)
     return excellent_courses
   end
@@ -78,18 +78,18 @@ module CoursesHelper
   #生成课程老师成员链接
   def course_teacher_link teacher_num
     if User.current.member_of_course?(@course) || User.current.admin?
-      link_to "#{teacher_num}", course_member_path(@course, :role => 1), :class => 'info_foot_num c_blue', :id => 'teacher_number'
+      link_to "#{teacher_num}", course_member_path(@course, :role => 1), :class => 'sy_cblue', :id => 'teacher_number'
     else
-      content_tag 'span',teacher_num, :class => 'info_foot_num c_blue'
+      content_tag 'span',teacher_num, :class => 'sy_cblue'
     end
   end
 
   #生成课程学生列表连接
   def course_student_link student_num
     if (User.current.logged? && @course.open_student == 1) || (User.current.member_of_course?(@course)) || User.current.admin?
-      link_to "#{student_num}", course_member_path(@course, :role => 2), :class => 'info_foot_num c_blue', :id => "student_number"
+      link_to "#{student_num}", course_member_path(@course, :role => 2), :class => 'sy_cblue', :id => "student_number"
     else
-      content_tag 'span',student_num, :class => 'info_foot_num c_blue'
+      content_tag 'span',student_num, :class => 'sy_cblue'
     end
   end
 
@@ -772,12 +772,12 @@ module CoursesHelper
       url = joined ? join_path(:object_id => course.id) : try_join_path(:object_id => course.id)
       method = joined ? 'delete' : 'post'
       if joined
-        link = link_to(text, url, :remote => true, :method => method, :class => "Blue-btn", :style => "margin_left: 0px;", :id => "#{course.id}", :confirm => l(:text_are_you_sure_out))
+        link = link_to(text, url, :remote => true, :method => method, :class => "sy_btn_grey fl", :id => "#{course.id}", :confirm => l(:text_are_you_sure_out))
       else
-        link = link_to(text, url, :remote => true, :method => method, :id => "#{course.id}", :class => "Blue-btn", :style => "margin_left: 0px;")
+        link = link_to(text, url, :remote => true, :method => method, :id => "#{course.id}", :class => "sy_btn_grey fl")
       end
     else
-      link = "<span class='pr_join_span mr5' >#{l(:label_course_join_student)}</span>"
+      link = "<a href='javascript:void(0)' class='sy_btn_grey fl ml10' >#{l(:label_course_join_student)}</a>"
     end
     link.html_safe
   end
@@ -872,7 +872,7 @@ module CoursesHelper
     desc.html_safe
   end
 
-  # 学生按作业总分排序，取前8个
+  # 学生按作业总分排序，取前3个
   def hero_homework_score(course, score_sort_by)
     sql_select = "SELECT members.*,(
           SELECT SUM(work_score)
@@ -884,14 +884,14 @@ module CoursesHelper
         FROM members
         JOIN students_for_courses
         ON students_for_courses.student_id = members.user_id AND students_for_courses.course_id = members.course_id
-        WHERE members.course_id = #{course.id} ORDER BY score #{score_sort_by} limit 9"
+        WHERE members.course_id = #{course.id} ORDER BY score #{score_sort_by} limit 3"
     homework_scores = Member.find_by_sql(sql_select)
   end
 
   def contributor_course_scor(course_id)
     ccs = CourseContributorScore.find_by_sql("SELECT * FROM `course_contributor_scores` where course_id = #{course_id} order by
         (message_num*2 + message_reply_num + news_reply_num + news_num +
-         resource_num*5 + journal_num + homework_journal_num ) desc limit 9;")
+         resource_num*5 + journal_num + homework_journal_num ) desc limit 3;")
   end
 
 end
diff --git a/app/views/courses/_course_activity_users.html.erb b/app/views/courses/_course_activity_users.html.erb
index 3b19de355..8b4df3e83 100644
--- a/app/views/courses/_course_activity_users.html.erb
+++ b/app/views/courses/_course_activity_users.html.erb
@@ -1,13 +1,15 @@
 <% unless contributor_course_scor(course.id).count == 0 %>
-    <ul class="rankList">
-      <h4>
+    <div>
+      <ul class="rankList">
+      <h3 style="font-size: 14px; font-weight: normal;">
         <% if (User.current.logged? && course.open_student == 1) || (User.current.member_of_course?(course)) || User.current.admin? %>
-            <%= link_to "班级活跃度", course_member_path(course, :role => 2, :sort_type => 'act_score'), :class => '' %>
+            <%= link_to "班级活跃度", course_member_path(course, :role => 2, :sort_type => 'act_score'), :class => 'sy_cblack' %>
         <% else %>
             班级活跃度
         <% end %>
-        <a class="contributor_course" onmouseover ="message_titile_show2($(this),event)" onmouseout ="message_titile_hide2($(this))" style="cursor: pointer; position:relative;">积分规则</a>
-      </h4>
+        <a class="sy_cmore fr" onmouseover ="message_titile_show2($(this),event)" onmouseout ="message_titile_hide2($(this))" style="cursor: pointer; position:relative;">积分规则</a>
+        <div class="cl"></div>
+      </h3>
       <div  class="numIntro undis" style="cursor:pointer;">
         <div class="active-degree-rule">
           积分规则<br/>
@@ -26,10 +28,11 @@
                   + contributor_score.homework_journal_num.to_i * 1 + contributor_score.news_reply_num.to_i * 1 +
                   contributor_score.news_num.to_i * 1 %>
           <% unless total_score ==0 %>
-              <li><%=link_to image_tag(url_to_avatar(contributor_score.user), :width => "35", :height => "35", :class=> "rankPortrait"),user_path(contributor_score.user) %>
+              <li>
+                <%=link_to image_tag(url_to_avatar(contributor_score.user), :width => "50", :height => "50", :class=> "rankPortrait"),user_path(contributor_score.user) %>
                 <p><%=link_to contributor_score.user.show_name, user_path(contributor_score.user.id), :title => contributor_score.user.show_name %></p>
-                <p><span class="c_green" style="cursor:pointer">
-                <a onmouseover ="message_titile_show($(this),event)" onmouseout ="message_titile_hide($(this))" class="c_green">
+                <p><span class="sy_corange" style="cursor:pointer">
+                <a onmouseover ="message_titile_show($(this),event)" onmouseout ="message_titile_hide($(this))" class="sy_corange">
                   <%=total_score %></a></span></p>
                 <div  style="display: none" class="numIntro">
                   <div class="contributor-course-calculate">积分计算</div>
@@ -60,5 +63,6 @@
           <% end %>
       <% end %>
       <div class="cl"></div>
-    </ul>
+      </ul>
+    </div>
 <% end %>
\ No newline at end of file
diff --git a/app/views/courses/_course_heroes.html.erb b/app/views/courses/_course_heroes.html.erb
index ea05eea53..4699c12d2 100644
--- a/app/views/courses/_course_heroes.html.erb
+++ b/app/views/courses/_course_heroes.html.erb
@@ -1,9 +1,9 @@
 <% hero_homework_scores = hero_homework_score(course, "desc") %>
 <% unless hero_homework_scores.map(&:score).detect{|s| s.to_i != 0}.nil? %>
     <ul class="rankList">
-      <h4>
+      <h4 style="font-size: 14px; font-weight: normal;">
         <% if (User.current.logged? && course.open_student == 1) || (User.current.member_of_course?(course)) || User.current.admin? %>
-            <%= link_to "班级英雄榜", course_member_path(course, :role => 2), :class => '' %>
+            <%= link_to "班级英雄榜", course_member_path(course, :role => 2), :class => 'sy_cblack' %>
         <% else %>
             <span>班级英雄榜</span>
         <% end %>
diff --git a/app/views/courses/_recommendation.html.erb b/app/views/courses/_recommendation.html.erb
index 1db2edf57..ea129577b 100644
--- a/app/views/courses/_recommendation.html.erb
+++ b/app/views/courses/_recommendation.html.erb
@@ -1,25 +1,15 @@
 <% exc_course = excellent_course_recommend(course) %>
 <% unless exc_course.length == 0 %>
-    <ul class="courseR mb10">
-      <h4 class="mb5" ><%= l(:label_homework_recommendation) %>：</h4>
-      <% exc_course.each do |e_course| %>
-          <li class="mt15"> <%= image_tag(url_to_avatar(e_course), :width => "40", :height => "40", :class => "fl mr10 rankPortrait", :alt => "logo") %>
-            <div class="fl">
-              <p class="f12 mb5"><%=link_to e_course.name, course_path(e_course.id), :class => "hidden fl w170" %><div class="cl"></div> </p>
-              <p class="f12">
-                <% if visable_attachemnts_incourse(e_course).count > 0 %>
-                    <span class="fl mr15 fontGrey4"><%= l(:project_module_attachments) %>(<%= link_to visable_attachemnts_incourse(e_course).count, course_files_path(e_course), :class => "linkBlue2" %>)</span>
-                <% end %>
-                <% if e_course.homework_commons.where("publish_time <= '#{Date.today}'").count > 0 %>
-                    <span class="fl fontGrey4"><%= l(:label_homework_commont) %>(<%= link_to e_course.homework_commons.where("publish_time <= '#{Date.today}'").count, homework_common_index_path(:course=>e_course.id), :class => "linkBlue2" %>)</span>
-                <% end %>
-                <div class="cl"></div>
-                </p>
-                </div>
-            <div class="cl"></div>
+    <ul class="sy_class_lclass">
+      <% exc_course.each_with_index do |e_course, i| %>
+          <li>
+            <span class="sy_sq_orange fl mr5 mt5"><%= i+1 %></span>
+            <%=link_to e_course.name, course_path(e_course.id), :class => "sy_class_ltitle fl mb10" %>
+            <p class="sy_cgrey ml20">作业<span class="sy_cir_grey ml5 mr5"><%=e_course.homework_commons.where("publish_time <= '#{Date.today}'").count %></span>
+              资源<span class="sy_cir_grey ml5 mr5"><%=visable_attachemnts_incourse(e_course).count %></span>
+            </p>
           </li>
       <% end %>
-      <div class="cl"></div>
     </ul>
 <% end %>
 
diff --git a/app/views/courses/_tool_expand.html.erb b/app/views/courses/_tool_expand.html.erb
index 52a971826..c41edf680 100644
--- a/app/views/courses/_tool_expand.html.erb
+++ b/app/views/courses/_tool_expand.html.erb
@@ -1,47 +1,53 @@
 <% course_file_num = visable_attachemnts_incourse(@course).count%>
 <% is_teacher = User.current.logged? && (User.current.admin? || User.current.allowed_to?(:as_teacher,@course)) %>
+<% if show_nav?(@course.boards.first ? @course.boards.first.topics.count : 0) %>
+    <li>
+      <a href="<%=course_boards_path(@course) %>">问答区</a>
+      <%= link_to( "",course_boards_path(@course, :flag => true, :is_new => 1), :class => 'sy_class_add', :title =>"#{l(:label_message_new)}") %>
+    </li>
+<% end %>
 <% if show_nav?(@course.homework_commons.count) %>
-    <div class="subNav">
-      <%= link_to l(:label_homework), homework_common_index_path(:course => @course.id), :class => "f12 c_blue02 ml10 fn"%>
-      <%= link_to( "", homework_common_index_path(:course => @course.id,:is_new => 1), :class => 'courseMenuSetting', :title =>"#{l(:label_course_homework_new)}") if is_teacher %>
-    </div>
+    <li>
+      <a href="<%= homework_common_index_path(:course => @course.id) %>">作业</a>
+      <%= link_to( "",homework_common_index_path(:course => @course.id,:is_new => 1), :class => 'sy_class_add', :title =>"#{l(:label_course_homework_new)}") if is_teacher %>
+    </li>
 <% end %>
 <% if show_nav?(@course.news.count) %>
-    <div class="subNav">
-      <%= link_to "通知", course_news_index_path(@course), :class => "f12 c_blue02 ml10 fn" %>
-      <%= link_to( "", new_course_news_path(@course), :class => 'courseMenuSetting', :title =>"#{l(:label_course_news_new)}") if is_teacher %>
-    </div>
+    <li>
+      <a href="<%=course_news_index_path(@course) %>">通知</a>
+      <%= link_to( "",new_course_news_path(@course,:is_new=>1), :class => 'sy_class_add', :title =>"#{l(:label_course_news_new)}") if is_teacher %>
+    </li>
 <% end %>
 <% if show_nav?(course_file_num) %>
-    <div class="subNav">
-      <%= link_to l(:label_course_file), course_files_path(@course), :class => "f12 c_blue02 ml10 fn" %>
+    <li>
+      <a href="<%=course_files_path(@course) %>">资源库</a>
       <% if is_teacher || (@course.publish_resource == 1  && User.current.member_of_course?(@course)) %>
-          <!--link_to( "+#{l(:label_upload_files)}", course_files_path(@course), :class => 'subnav_green ml95 c_white')-->
-          <a class="courseMenuSetting" title="上传资源" href="javascript:void(0);" onclick="course_files_upload();"> </a>
+          <a class="sy_class_add" title="上传资源" href="javascript:void(0);" onclick="course_files_upload();"> </a>
       <% end %>
-    </div>
-<% end %>
-<% if show_nav?(@course.boards.first ? @course.boards.first.topics.count : 0) %>
-    <div class="subNav">
-      <%= link_to l(:label_course_board), course_boards_path(@course), :class => "f12 c_blue02 ml10 fn" %>
-      <%= link_to( "",course_boards_path(@course, :flag => true, :is_new => 1), :class => 'courseMenuSetting', :title =>"#{l(:label_message_new)}") %>
-    </div>
+    </li>
 <% end %>
 <% if show_nav?(course_feedback_count) %>
-    <div class="subNav">
-      <%= link_to l(:label_course_feedback), course_feedback_path(@course), :class => "f12 c_blue02 ml10 fn" %>
-      <%= link_to "", course_feedback_path(@course), :class => 'courseMenuSetting', :title =>"#{l(:label_course_feedback)}", :id => "course_jour_count"%>
-    </div>
+    <li>
+      <a href="<%=course_feedback_path(@course) %>">留言</a>
+      <%= link_to "", course_feedback_path(@course), :class => 'sy_class_add', :title =>"#{l(:label_course_feedback)}", :id => "course_jour_count"%>
+    </li>
 <% end %>
 <% if show_nav?(course_poll_count) %>
-    <div class="subNav">
-      <%= link_to l(:label_poll), poll_index_path(:polls_type => "Course", :polls_group_id => @course.id), :class => " f12 c_blue02 ml10 fn"%>
-      <%= link_to( "", new_poll_path(:polls_type => "Course",:polls_group_id => @course.id), :class => 'courseMenuSetting', :title =>"#{l(:label_new_poll)}") if is_teacher %>
-    </div>
+    <li>
+      <a href="<%=poll_index_path(:polls_type => "Course", :polls_group_id => @course.id) %>">问卷调查</a>
+      <%= link_to( "", new_poll_path(:polls_type => "Course",:polls_group_id => @course.id), :class => 'sy_class_add', :title =>"#{l(:label_new_poll)}") if is_teacher %>
+    </li>
+<% end %>
+<% count = User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status <> 1").count %>
+<% if show_nav?(count) %>
+    <li>
+      <a href="<%=exercise_index_path(:course_id => @course.id) %>">在线测验</a>
+      <%= link_to( "", new_exercise_path(:course_id => @course.id), :class => 'sy_class_add', :title =>"新建试卷") if is_teacher %>
+    </li>
 <% end %>
-<% if show_nav?(User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status=2").count) %>
-    <div class="subNav">
-      <%= link_to "在线测验", exercise_index_path(:course_id => @course.id), :class => " f12 c_blue02 ml10 fn"%>
-      <%= link_to( "", new_exercise_path(:course_id => @course.id), :class => 'courseMenuSetting', :title =>"新建试卷") if is_teacher %>
-    </div>
+<% if show_nav?(0) %>
+    <li>
+      <a href="<%=statistics_course_course_path(@course) %>">统计</a>
+      <!--<a href="javascript:void(0);" class="sy_class_add"></a>-->
+    </li>
 <% end %>
\ No newline at end of file
diff --git a/app/views/courses/feedback.html.erb b/app/views/courses/feedback.html.erb
index c45259efd..5eae03656 100644
--- a/app/views/courses/feedback.html.erb
+++ b/app/views/courses/feedback.html.erb
@@ -1,5 +1,7 @@
 <% reply_allow = JournalsForMessage.create_by_user? User.current %>
 <!-- <#%= stylesheet_link_tag  'css', :media => 'all' %> -->
+<div class="courseRSide fl">
+
 <div class="project_r_h">
   <h2 class="project_h2"><%= l(:label_contest_userresponse) %></h2>
 </div>
@@ -9,4 +11,5 @@
            :locals => { :contest => @contest, :journals => @jour, :state => false}
 %>
 
-<% html_title(l(:label_course_feedback)) -%>
\ No newline at end of file
+<% html_title(l(:label_course_feedback)) -%>
+</div>
\ No newline at end of file
diff --git a/app/views/courses/statistics_course.html.erb b/app/views/courses/statistics_course.html.erb
new file mode 100644
index 000000000..ce3d65743
--- /dev/null
+++ b/app/views/courses/statistics_course.html.erb
@@ -0,0 +1,5 @@
+<div class="sy_class_r ml10">
+  <div class="icons_tishi"><img src="../../images/sy/icons_smile.png" width="110" height="110" alt="" ></div>
+  <p class="sy_tab_con_p">统计功能即将上线，届时我们一起享受教育大数据的红利吧！</p>
+  <div style="height:400px;"></div>
+</div><!--sy_class_r end-->
\ No newline at end of file
diff --git a/app/views/exercise/_exercise_form.html.erb b/app/views/exercise/_exercise_form.html.erb
index 9d70511e8..50df61cc9 100644
--- a/app/views/exercise/_exercise_form.html.erb
+++ b/app/views/exercise/_exercise_form.html.erb
@@ -2,7 +2,7 @@
 <script type="text/javascript">
     $(function(){
         $("#RSide").removeAttr("id");
-        $("#homework_page_right").css("min-height",$("#LSide").height()-30);
+        $("#homework_page_right").css("min-height",$("#courseLSide").height()-33);
         $("#Container").css("width","1000px");
     });
     //编辑问卷描述之后
diff --git a/app/views/exercise/_exercise_student.html.erb b/app/views/exercise/_exercise_student.html.erb
index 4f4892b79..e157ea155 100644
--- a/app/views/exercise/_exercise_student.html.erb
+++ b/app/views/exercise/_exercise_student.html.erb
@@ -1,7 +1,7 @@
 <script type="text/javascript">
     $(function(){
         $("#RSide").removeAttr("id");
-        $("#homework_page_right").css("min-height",$("#LSide").height()-30);
+        $("#homework_page_right").css("min-height",$("#courseLSide").height()-33);
         $("#Container").css("width","1000px");
         var end_time = <%=exercise.end_time.to_i%>;
         getTime(end_time);
diff --git a/app/views/exercise/_exercise_student_result.html.erb b/app/views/exercise/_exercise_student_result.html.erb
index 59a58901c..e010c4af3 100644
--- a/app/views/exercise/_exercise_student_result.html.erb
+++ b/app/views/exercise/_exercise_student_result.html.erb
@@ -1,7 +1,7 @@
 <script type="text/javascript">
     $(function(){
         $("#RSide").removeAttr("id");
-        $("#homework_page_right").css("min-height",$("#LSide").height()-30);
+        $("#homework_page_right").css("min-height",$("#courseLSide").height()-33);
         $("#Container").css("width","1000px");
     });
 </script>
diff --git a/app/views/exercise/_exercise_teacher.html.erb b/app/views/exercise/_exercise_teacher.html.erb
index ce3928817..78bf2b7be 100644
--- a/app/views/exercise/_exercise_teacher.html.erb
+++ b/app/views/exercise/_exercise_teacher.html.erb
@@ -1,7 +1,7 @@
 <script type="text/javascript">
     $(function(){
         $("#RSide").removeAttr("id");
-        $("#homework_page_right").css("min-height",$("#LSide").height()-30);
+        $("#homework_page_right").css("min-height",$("#courseLSide").height()-33);
         $("#Container").css("width","1000px");
     });
 </script>
diff --git a/app/views/exercise/index.html.erb b/app/views/exercise/index.html.erb
index 8637273f1..68adfb4d4 100644
--- a/app/views/exercise/index.html.erb
+++ b/app/views/exercise/index.html.erb
@@ -1,9 +1,7 @@
 <%= stylesheet_link_tag  'polls', :media => 'all' %>
 <script type="text/javascript">
     $(function(){
-        $("#RSide").css("width","730px");
-        $("#homework_page_right").css("min-height",$("#LSide").height()-30);
-        $("#Container").css("width","1000px");
+        $("#homework_page_right").css("min-height",$("#courseLSide").height()-33);
     });
     function republish_exercise(exercise_id,index)
     {
@@ -63,6 +61,8 @@
     }
 
 </script>
+<div class="courseRSide fl" id="homework_page_right">
 <div class="polls_content02" id="exercise" style="width: 730px;">
   <%= render :partial => 'exercises_list'%>
-</div><!--问卷内容end-->
\ No newline at end of file
+</div><!--问卷内容end-->
+</div>
\ No newline at end of file
diff --git a/app/views/exercise/student_exercise_list.html.erb b/app/views/exercise/student_exercise_list.html.erb
index 02f161589..1cbe058a1 100644
--- a/app/views/exercise/student_exercise_list.html.erb
+++ b/app/views/exercise/student_exercise_list.html.erb
@@ -1,7 +1,7 @@
 <script type="text/javascript">
     $(function(){
         $("#RSide").removeAttr("id");
-        $("#homework_page_right").css("min-height",$("#LSide").height()-30);
+        $("#homework_page_right").css("min-height",$("#courseLSide").height()-47);
         $("#Container").css("width","1000px");
     });
 
diff --git a/app/views/layouts/_base_course_old.html.erb b/app/views/layouts/_base_course_old.html.erb
new file mode 100644
index 000000000..4b2077cf8
--- /dev/null
+++ b/app/views/layouts/_base_course_old.html.erb
@@ -0,0 +1,278 @@
+<%# course_model %>
+<% course_file_num = visable_attachemnts_incourse(@course).count%>
+<% is_teacher = User.current.logged? && (User.current.admin? || User.current.allowed_to?(:as_teacher,@course)) %>
+<% homework_num = visable_course_homework @course %>
+
+<!DOCTYPE html>
+<html lang="en" xmlns="http://www.w3.org/1999/html">
+<head>
+  <meta charset="utf-8">
+  <title>
+    <%= h html_title %>
+  </title>
+  <meta name="description" content="<%= Redmine::Info.app_name %>"/>
+  <meta name="keywords" content="issue,bug,tracker"/>
+  <%= csrf_meta_tag %>
+  <%= favicon %>
+  <%= javascript_heads %>
+  <%= heads_for_theme %>
+  <%= call_hook :view_layouts_base_html_head %>
+  <%= stylesheet_link_tag  'jquery/jquery-ui-1.9.2','css/common','css/public', 'css/structure','prettify', 'css/courses','css/popup'%>
+  <%= javascript_include_tag "course","sy_public", "syllabus","header","attachments",'prettify' %>
+  <!-- page specific tags -->
+  <%= yield :header_tags -%>
+  <!-- MathJax的配置 -->
+  <script type="text/javascript"
+          src="/javascripts/MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
+  </script>
+  <!--<script type="text/javascript"-->
+  <!--src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">-->
+  <!--</script>-->
+  <!-- 配置 ： 在生成的公式图片上去掉Math定义的右键菜单，$$ $$ \( \) \[ \] 中的公式给予显示-->
+  <script type="text/x-mathjax-config">
+    MathJax.Hub.Config({
+
+    showMathMenu: false,
+    showMathMenuMSIE: false,
+      tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']]}
+    });
+  </script>
+</head>
+<!--add by huang-->
+<body onload="prettyPrint();">
+<div class="navContainer mb10">
+  <% if User.current.logged? %>
+      <%= render :partial => 'layouts/logined_header' %>
+  <% else%>
+      <%= render :partial => 'layouts/unlogin_header' %>
+  <% end%>
+</div>
+<div class="cl"></div>
+<div id="Container">
+  <div id="content">
+    <div id="LSide" class="fl">
+      <div class="project_info" style="position: relative" id="project_info_<%=@course.id %>">
+        <%=render :partial=>'layouts/project_info' %>
+      </div><!--课程信息 end-->
+
+      <div class="info_box">
+        <ul>
+          <li><%= l(:label_main_teacher)%> :&nbsp;&nbsp;<%= link_to(@course.teacher.lastname+@course.teacher.firstname, user_path(@course.teacher), :class => 'c_dblue') %></li>
+          <li><%= l(:label_class_period)%> :&nbsp;&nbsp;<span ><%= @course.class_period %> <%= l(:label_class_hour) %></span></li>
+          <li><%= l(:label_main_term)%> :&nbsp;&nbsp;<span><%= current_time_and_term @course %></span></li>
+          <% if @course.school%>
+              <li><%= l(:label_course_organizers)%> :&nbsp;&nbsp;<%= @course.school%></li>
+          <% end%>
+        </ul>
+      </div>
+
+      <%# 更新访问数,刷新的时候更新访问次数 %>
+      <%  update_visiti_count @course %>
+      <%# over %>
+
+      <div class="subNavBox">
+        <% unless show_nav?(@course.course_activities.count) %>
+            <div class="subNav">
+              <%= link_to l(:label_activity), course_path(@course), :class => "f14 c_blue02" %>
+              <!--暂时不显示课程动态数，优化后在显示-->
+              <%= link_to "(#{@course.course_activities.count})", course_path(@course), :class => "subnav_num c_orange"%>
+            </div>
+        <% end %>
+        <% unless show_nav?(@course.homework_commons.count) %>
+            <div class="subNav">
+              <%= link_to l(:label_homework), homework_common_index_path(:course => @course.id), :class => "f14 c_blue02"%>
+              <%= link_to "(#{homework_num})", homework_common_index_path(:course => @course.id), :class => "subnav_num c_orange"%>
+              <%= link_to( "", homework_common_index_path(:course => @course.id,:is_new => 1), :class => 'courseMenuSetting', :title =>"#{l(:label_course_homework_new)}") if is_teacher %>
+            </div>
+        <% end %>
+        <% unless show_nav?(@course.news.count) %>
+            <div class="subNav">
+              <%= link_to "通知", course_news_index_path(@course), :class => "f14 c_blue02" %>
+              <%= link_to "(#{@course.news.count})", course_news_index_path(@course), :class => "subnav_num c_orange"%>
+              <%= link_to( "", new_course_news_path(@course,:is_new=>1), :class => 'courseMenuSetting', :title =>"#{l(:label_course_news_new)}") if is_teacher %>
+            </div>
+        <% end %>
+        <% unless show_nav?(course_file_num) %>
+            <div class="subNav">
+              <%= link_to l(:label_course_file), course_files_path(@course), :class => "f14 c_blue02" %>
+              <%= link_to "(#{course_file_num})", course_files_path(@course), :class => "subnav_num c_orange",:id=>'courses_files_count_nav' %>
+              <% if is_teacher || (@course.publish_resource == 1  && User.current.member_of_course?(@course)) %>
+                  <!--link_to( "+#{l(:label_upload_files)}", course_files_path(@course), :class => 'subnav_green ml95 c_white')-->
+                  <a class="courseMenuSetting" title="上传资源" href="javascript:void(0);" onclick="course_files_upload();"> </a>
+              <% end %>
+            </div>
+        <% end %>
+        <% unless show_nav?(@course.boards.first ? @course.boards.first.topics.count : 0) %>
+            <div class="subNav">
+              <%= link_to l(:label_course_board), course_boards_path(@course), :class => "f14 c_blue02" %>
+              <%= link_to "(#{@course.boards.first ? (@course.boards.first.topics.count + Message.where("board_id =? and parent_id is not ?", @course.boards.first.id, nil).count) : 0})", course_boards_path(@course), :class => "subnav_num c_orange" %>
+              <%= link_to( "",course_boards_path(@course, :flag => true, :is_new => 1), :class => 'courseMenuSetting', :title =>"#{l(:label_message_new)}") %>
+            </div>
+        <% end %>
+        <% unless show_nav?(course_feedback_count) %>
+            <div class="subNav">
+              <%= link_to l(:label_course_feedback), course_feedback_path(@course), :class => "f14 c_blue02" %>
+              <%= link_to "(#{course_feedback_count})", course_feedback_path(@course), :class => "subnav_num c_orange", :id => "course_jour_count"%>
+              <%= link_to "", course_feedback_path(@course), :class => 'courseMenuSetting', :title =>"#{l(:label_course_feedback)}", :id => "course_jour_count"%>
+            </div>
+        <% end %>
+        <% unless show_nav?(course_poll_count) %>
+            <div class="subNav">
+              <%= link_to l(:label_poll), poll_index_path(:polls_type => "Course", :polls_group_id => @course.id), :class => " f14 c_blue02"%>
+              <%= link_to "(#{course_poll_count})", poll_index_path(:polls_type => "Course", :polls_group_id => @course.id), :class => "subnav_num c_orange" %>
+              <%= link_to( "", new_poll_path(:polls_type => "Course",:polls_group_id => @course.id), :class => 'courseMenuSetting', :title =>"#{l(:label_new_poll)}") if is_teacher %>
+            </div>
+        <% end %>
+        <% unless show_nav?(User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status <> 1").count) %>
+            <div class="subNav">
+              <%= link_to "在线测验", exercise_index_path(:course_id => @course.id), :class => " f14 c_blue02"%>
+              <%= link_to "(#{User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status <> 1").count})", exercise_index_path(:course_id => @course.id), :class => "subnav_num c_orange" %>
+              <%= link_to( "", new_exercise_path(:course_id => @course.id), :class => 'courseMenuSetting', :title =>"新建试卷") if is_teacher %>
+            </div>
+        <% end %>
+        <%# 工具栏展开 %>
+        <% if @course.homework_commons.count == 0 || @course.news.count == 0 || course_file_num == 0 || course_poll_count == 0 || @course.exercises.count == 0 ||
+                course_feedback_count == 0 || @course.exercises.count == 0 || (@course.boards.first ? @course.boards.first.topics.count : 0) == 0 %>
+
+            <div class="subNav subNav_jiantou" id="expand_tools_expand"><%= l(:label_project_more) %></div>
+            <ul class="navContent" id="navContentCourse">
+              <%= render 'courses/tool_expand', :locals => {:is_teacher => is_teacher, :course_file_num => course_file_num} %>
+            </ul>
+        <% end %>
+      </div><!--项目侧导航 end-->
+      <%# 课程活跃度 %>
+      <div class="cl"></div>
+      <%= render :partial => 'courses/course_activity_users', :locals => {:course => @course} %>
+      <%# 课程英雄榜 %>
+      <%= render :partial => 'courses/course_heroes', :locals => {:course => @course} %>
+
+      <% if @course.description && !@course.description.blank? %>
+          <div class="project_intro">
+            <div id="course_description" class="course_description">
+              <h4 ><%= l(:label_course_brief_introduction)%>：</h4>
+              <div id="course_description_content">
+                <%= textilizable(@course.description) if @course.description && !@course.description.blank? %>
+              </div>
+            </div>
+            <div class="lg-foot" id="lg-foot" onclick="show_more_msg();">
+              <label id="expend_more_information"  value="show_more"><%= l(:label_expend_information)%></label>
+          <span class="g-arr-down">
+            <img id="arrow" src="/images/jiantou.jpg" width="12" height="6" />
+          </span>
+            </div>
+          </div><!--项目简介 end-->
+      <% end %>
+      <div class="project_Label">
+        <h4 class="mb5" ><%= l(:label_tag)%>：</h4>
+        <div class="tag_h" >
+          <%= render :partial => 'tags/new_tag', :locals => {:obj => @course, :object_flag => "9"} %>
+        </div>
+        <div class="cl"></div>
+      </div><!--项目标签 end-->
+      <!--课程推荐-->
+      <%= render :partial => 'courses/recommendation', :locals => {:course => @course} %>
+      <div class="fontGrey5 mt10 ml10 mb10">访问计数 <%= @course.visits.to_i %> （自2016年5月）</div>
+    </div><!--LSide end-->
+
+    <div id="RSide" class="fl">
+      <%= yield %>
+      <%#= render_flash_messages %>
+      <%#= call_hook :view_layouts_base_content %>
+    </div>
+
+    <div class="cl"></div>
+
+  </div><!--Content end-->
+</div><!--Container end-->
+
+<div class="cl"></div>
+<%= render :partial => 'layouts/footer' %>
+<div class="cl"></div>
+
+<%= render :partial => 'layouts/new_feedback' %>
+<div id="ajax-indicator" style="display:none;">
+  <span><%= l(:label_loading) %></span>
+</div>
+<div id="ajax-modal" style="display:none;"></div>
+<%= call_hook :view_layouts_base_body_bottom %>
+</body>
+<script>
+    var blog_artile_list_html = '';
+    $(function(){
+        $(document).on('input','input[name="course_outline_search"]',function(e){
+            throttle(course_outline_search,window,e);
+        })
+        function throttle(method,context,e){
+            clearTimeout(method.tId);
+            method.tId=setTimeout(function(){
+                method.call(context,e);
+            },500);
+        }
+        function course_outline_search(e){
+//            if($(e.target).val().trim() == ''){
+//                return;
+//            }
+            $("#course_outline_hint").hide();
+            $.ajax({
+                url:'<%=search_course_outline_course_path(@course) %>'+"?&title="+ e.target.value,
+                type:'post',
+                success:function(data){
+
+                    if(data.length != 0 ){
+                        $("#course_outline_list").html('');
+                        for(var i =0;i<data.length;i++){
+                            var html = ' <ul class="blogRow"> '+
+                                    ' <li class="fl"> '+
+                                    '<input name="outline_id" type="radio" value="'+data[i].blog_comment.id+'" class="courseSendCheckbox"/>'+
+                                    '</li>'+
+                                    '<li class="blogTitle fl">'+data[i].blog_comment.title+'</li>'+
+                                    '</ul>'+
+                                    '<div class="homeworkPublishTime">发布时间：'+data[i].blog_comment.created_at.match(/(\S*)T/)[1]+'</div>';
+                            $("#course_outline_list").append(html)
+                        }
+
+                    }else{
+                        $("#course_outline_list").html('');
+                        $("#course_outline_hint").show();
+                    }
+                }
+            })
+        }
+
+    })
+    //资源库上传附件
+    function course_files_upload(){
+        $('#ajax-modal').html('<%= escape_javascript(render :partial => 'files/upload_course_files',:locals => {:course => @course,:course_attachment_type => 1}) %>');
+        showModal('ajax-modal', '513px');
+        $('#ajax-modal').siblings().remove();
+        $('#ajax-modal').before("<a href='javascript:void(0)' onclick='hideModal()' style='margin-left: 480px;'><img src='/images/bid/close.png' width='26px' height='26px' /></a>");
+        $('#ajax-modal').parent().css("top","").css("left","").css("border","3px solid #269ac9");
+        $('#ajax-modal').parent().addClass("popbox_polls");
+    }
+    //    鼠标经过的时候显示内容
+    function message_titile_show(obj,e)
+    {
+        obj.parent().parent().next("div").show();
+        obj.parent().next("div").css("top",e.pageY).css("left",e.pageX).css("position","absolute");
+    }
+    function message_titile_hide(obj)
+    {
+        obj.parent().parent().next("div").hide();
+    }
+
+    function message_titile_show2(obj,e)
+    {
+        obj.parent().next("div").show();
+        obj.parent().next("div").css("top",e.pageY).css("left",e.pageX).css("position","absolute");
+    }
+    function message_titile_hide2(obj)
+    {
+        obj.parent().next("div").hide();
+    }
+
+    $("#expand_tools_expand").click(function(){
+        $("#navContentCourse").toggle();
+    });
+</script>
+
+</html>
\ No newline at end of file
diff --git a/app/views/layouts/_course_base_info.html.erb b/app/views/layouts/_course_base_info.html.erb
new file mode 100644
index 000000000..bd152ac6e
--- /dev/null
+++ b/app/views/layouts/_course_base_info.html.erb
@@ -0,0 +1,55 @@
+<% is_teacher = User.current.logged? && (User.current.admin? || User.current.allowed_to?(:as_teacher,@course)) %>
+<% teacher_num = TeacherAndAssistantCount(@course) %>
+<% student_num = studentCount(@course) %>
+<% course_file_num = visable_attachemnts_incourse(@course).count %>
+<p class="sy_cgrey mb10">
+  <%=link_to @course.syllabus.title, syllabus_path(@course.syllabus_id), :class => 'sy_cgrey' %>
+  &nbsp;&gt;&nbsp;
+  <%=link_to @course.name, course_path(@course), :class => 'sy_cgrey' %>
+</p>
+
+<% if is_teacher %>
+    <div class="homepagePostSetting" >
+      <ul>
+        <li class="homepagePostSettingIcon">
+          <ul class="homepagePostSettiongText">
+            <li><%= link_to "班级配置", {:controller => 'courses', :action => 'settings', :id => @course}, :class => "postOptionLink" %></li>
+            <li><%= link_to @course.is_public == 0 ? "设为公开" : "设为私有", {:controller => 'courses', :action => 'private_or_public', :id => @course},:remote=>true,:confirm=>"您确定要设置为"+(@course.is_public == 0 ? "公开" : "私有")+"吗", :class => "postOptionLink" %></li>
+            <li><%= link_to "复制学期", copy_course_course_path(@course.id),:remote=>true, :class => "postOptionLink" %></li>
+            <li><%= link_to "进入课程", syllabus_path(@course.syllabus), :class => "postOptionLink", :target => "_blank" %></li>
+          </ul>
+        </li>
+      </ul>
+    </div>
+<% end %>
+
+<div class="cl"></div>
+<div class="sy_class_logo fl">
+  <%= image_tag(url_to_avatar(@course), :width => "110", :height => "110", :alt => "班级logo") %>
+</div>
+<div class="sy_class_id fl">
+  <p>邀请码<br /><span class="sy_corange"><%=@course.generate_invite_code %></span></p>
+</div>
+<div class="sy_class_info fl ml15">
+  <div  class="sy_class_titbox">
+    <h3 class="fl sy_class_title"><%=@course.name %></h3>
+    <span class="icon_si fl mr20"><%=@course.is_public == 0 ? '私有' : '公开' %></span>
+    <p class="sy_cgrey fl mt3">
+      <span class=" mr15">教师：<%= course_teacher_link teacher_num %></span>
+      <span class=" mr15">学生：<%= course_student_link student_num %></span>
+      <span class=" mr15">资源：<%= link_to course_file_num, course_files_path(@course), :class => 'sy_cblue',:id=>'courses_files_count_info' %></span>
+    </p>
+    <div class="cl"></div>
+  </div>
+  <p class="sy_cgrey mb10">
+    <span class=" mr15">主讲老师：<%= link_to(@course.teacher.show_name, user_path(@course.teacher), :class => 'sy_cblue') %></span>
+    <span class=" mr15">学时：<span  class="sy_cblack"><%= @course.class_period %>学时</span></span>
+    <span class=" mr15">学期：<span  class="sy_cblack"><%= current_time_and_term @course %></span></span>
+    <span class=" mr15">单位：<span class="sy_cblack"><%= @course.school ? @course.school : '无' %></span></span>
+  </p>
+  <!--<a href="javascript:void(0);" class="sy_btn_orange mr10" > 教师身份</a>-->
+  <% unless is_teacher %>
+      <div id="join_in_course_header"><%= join_in_course_header(@course, User.current) %></div>
+  <% end %>
+</div>
+<div class="cl"></div>
\ No newline at end of file
diff --git a/app/views/layouts/base_courses.html.erb b/app/views/layouts/base_courses.html.erb
index 1d749c5e8..9332ade4f 100644
--- a/app/views/layouts/base_courses.html.erb
+++ b/app/views/layouts/base_courses.html.erb
@@ -17,8 +17,8 @@
   <%= javascript_heads %>
   <%= heads_for_theme %>
   <%= call_hook :view_layouts_base_html_head %>
-  <%= stylesheet_link_tag  'jquery/jquery-ui-1.9.2','css/common','css/public', 'css/structure','prettify', 'css/courses','css/popup'%>
-  <%= javascript_include_tag "course","sy_public", "syllabus","header","attachments",'prettify' %>
+  <%= stylesheet_link_tag  'jquery/jquery-ui-1.9.2','css/common','css/public', 'css/structure','prettify', 'css/courses','css/popup','sy_public','syllabus'%>
+  <%= javascript_include_tag "course","header","attachments",'prettify' %>
   <!-- page specific tags -->
   <%= yield :header_tags -%>
   <!-- MathJax的配置 -->
@@ -40,7 +40,7 @@
 </head>
 <!--add by huang-->
 <body onload="prettyPrint();">
-<div class="navContainer mb10">
+<div class="navContainer">
   <% if User.current.logged? %>
       <%= render :partial => 'layouts/logined_header' %>
   <% else%>
@@ -48,146 +48,103 @@
   <% end%>
 </div>
 <div class="cl"></div>
-<div id="Container">
-  <div id="content">
-    <div id="LSide" class="fl">
-      <div class="project_info" style="position: relative" id="project_info_<%=@course.id %>">
-        <%=render :partial=>'layouts/project_info' %>
-      </div><!--课程信息 end-->
-
-      <div class="info_box">
-        <ul>
-          <li><%= l(:label_main_teacher)%> :&nbsp;&nbsp;<%= link_to(@course.teacher.lastname+@course.teacher.firstname, user_path(@course.teacher), :class => 'c_dblue') %></li>
-          <li><%= l(:label_class_period)%> :&nbsp;&nbsp;<span ><%= @course.class_period %> <%= l(:label_class_hour) %></span></li>
-          <li><%= l(:label_main_term)%> :&nbsp;&nbsp;<span><%= current_time_and_term @course %></span></li>
-          <% if @course.school%>
-            <li><%= l(:label_course_organizers)%> :&nbsp;&nbsp;<%= @course.school%></li>
-          <% end%>
-        </ul>
-      </div>
-
-      <%# 更新访问数,刷新的时候更新访问次数 %>
-      <%  update_visiti_count @course %>
-      <%# over %>
-
-      <div class="subNavBox">
-        <% unless show_nav?(@course.course_activities.count) %>
-        <div class="subNav">
-          <%= link_to l(:label_activity), course_path(@course), :class => "f14 c_blue02" %>
-          <!--暂时不显示课程动态数，优化后在显示-->
-          <%= link_to "(#{@course.course_activities.count})", course_path(@course), :class => "subnav_num c_orange"%>
-        </div>
-        <% end %>
-        <% unless show_nav?(@course.homework_commons.count) %>
-        <div class="subNav">
-          <%= link_to l(:label_homework), homework_common_index_path(:course => @course.id), :class => "f14 c_blue02"%>
-          <%= link_to "(#{homework_num})", homework_common_index_path(:course => @course.id), :class => "subnav_num c_orange"%>
-          <%= link_to( "", homework_common_index_path(:course => @course.id,:is_new => 1), :class => 'courseMenuSetting', :title =>"#{l(:label_course_homework_new)}") if is_teacher %>
-        </div>
-        <% end %>
-        <% unless show_nav?(@course.news.count) %>
-        <div class="subNav">
-          <%= link_to "通知", course_news_index_path(@course), :class => "f14 c_blue02" %>
-          <%= link_to "(#{@course.news.count})", course_news_index_path(@course), :class => "subnav_num c_orange"%>
-          <%= link_to( "", new_course_news_path(@course,:is_new=>1), :class => 'courseMenuSetting', :title =>"#{l(:label_course_news_new)}") if is_teacher %>
-        </div>
-        <% end %>
-        <% unless show_nav?(course_file_num) %>
-        <div class="subNav">
-          <%= link_to l(:label_course_file), course_files_path(@course), :class => "f14 c_blue02" %>
-          <%= link_to "(#{course_file_num})", course_files_path(@course), :class => "subnav_num c_orange",:id=>'courses_files_count_nav' %>
-          <% if is_teacher || (@course.publish_resource == 1  && User.current.member_of_course?(@course)) %>
-              <!--link_to( "+#{l(:label_upload_files)}", course_files_path(@course), :class => 'subnav_green ml95 c_white')-->
-              <a class="courseMenuSetting" title="上传资源" href="javascript:void(0);" onclick="course_files_upload();"> </a>
+<div class="">
+  <div class="sy_class_infobox">
+    <%=render :partial => 'layouts/course_base_info' %>
+  </div>
+
+  <div class="sy_content">
+    <div class="sy_class_l fl" id="courseLSide">
+      <div class="sy_class_leftnav mb12">
+        <ul class="accordion">
+          <% unless show_nav?(@course.course_activities.count) %>
+              <li id="sy_01" class="sy_icons_index">
+                <a href="<%=course_path(@course) %>" >动态<span><%=@course.course_activities.count %></span></a>
+              </li>
           <% end %>
-        </div>
-        <% end %>
-        <% unless show_nav?(@course.boards.first ? @course.boards.first.topics.count : 0) %>
-        <div class="subNav">
-          <%= link_to l(:label_course_board), course_boards_path(@course), :class => "f14 c_blue02" %>
-          <%= link_to "(#{@course.boards.first ? (@course.boards.first.topics.count + Message.where("board_id =? and parent_id is not ?", @course.boards.first.id, nil).count) : 0})", course_boards_path(@course), :class => "subnav_num c_orange" %>
-          <%= link_to( "",course_boards_path(@course, :flag => true, :is_new => 1), :class => 'courseMenuSetting', :title =>"#{l(:label_message_new)}") %>
-        </div>
-        <% end %>
-        <% unless show_nav?(course_feedback_count) %>
-        <div class="subNav">
-          <%= link_to l(:label_course_feedback), course_feedback_path(@course), :class => "f14 c_blue02" %>
-          <%= link_to "(#{course_feedback_count})", course_feedback_path(@course), :class => "subnav_num c_orange", :id => "course_jour_count"%>
-          <%= link_to "", course_feedback_path(@course), :class => 'courseMenuSetting', :title =>"#{l(:label_course_feedback)}", :id => "course_jour_count"%>
-        </div>
-        <% end %>
-        <% unless show_nav?(course_poll_count) %>
-        <div class="subNav">
-          <%= link_to l(:label_poll), poll_index_path(:polls_type => "Course", :polls_group_id => @course.id), :class => " f14 c_blue02"%>
-          <%= link_to "(#{course_poll_count})", poll_index_path(:polls_type => "Course", :polls_group_id => @course.id), :class => "subnav_num c_orange" %>
-          <%= link_to( "", new_poll_path(:polls_type => "Course",:polls_group_id => @course.id), :class => 'courseMenuSetting', :title =>"#{l(:label_new_poll)}") if is_teacher %>
-        </div>
-        <% end %>
-        <% unless show_nav?(User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status <> 1").count) %>
-        <div class="subNav">
-          <%= link_to "在线测验", exercise_index_path(:course_id => @course.id), :class => " f14 c_blue02"%>
-          <%= link_to "(#{User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status <> 1").count})", exercise_index_path(:course_id => @course.id), :class => "subnav_num c_orange" %>
-          <%= link_to( "", new_exercise_path(:course_id => @course.id), :class => 'courseMenuSetting', :title =>"新建试卷") if is_teacher %>
-        </div>
-        <% end %>
-        <%# 工具栏展开 %>
-        <% if @course.homework_commons.count == 0 || @course.news.count == 0 || course_file_num == 0 || course_poll_count == 0 || @course.exercises.count == 0 ||
-             course_feedback_count == 0 || @course.exercises.count == 0 || (@course.boards.first ? @course.boards.first.topics.count : 0) == 0 %>
-
-            <div class="subNav subNav_jiantou" id="expand_tools_expand"><%= l(:label_project_more) %></div>
-            <ul class="navContent" id="navContentCourse">
-              <%= render 'courses/tool_expand', :locals => {:is_teacher => is_teacher, :course_file_num => course_file_num} %>
-            </ul>
-        <% end %>
-      </div><!--项目侧导航 end-->
+          <% unless show_nav?(@course.boards.first ? @course.boards.first.topics.count : 0) %>
+              <li id="sy_02" class="sy_icons_boards">
+                <% count = @course.boards.first ? (@course.boards.first.topics.count + Message.where("board_id =? and parent_id is not ?", @course.boards.first.id, nil).count) : 0 %>
+                <a href="<%=course_boards_path(@course) %>">问答区<span><%=count %></span></a>
+                <%= link_to( "",course_boards_path(@course, :flag => true, :is_new => 1), :class => 'sy_class_add', :title =>"#{l(:label_message_new)}") %>
+              </li>
+          <% end %>
+          <% unless show_nav?(@course.homework_commons.count) %>
+              <li id="sy_03" class="sy_icons_hwork">
+                <a href="<%= homework_common_index_path(:course => @course.id) %>">作业<span><%=homework_num %></span></a>
+                <%= link_to( "",homework_common_index_path(:course => @course.id,:is_new => 1), :class => 'sy_class_add', :title =>"#{l(:label_course_homework_new)}") if is_teacher %>
+              </li>
+          <% end %>
+          <% unless show_nav?(@course.news.count) %>
+              <li id="sy_04" class="sy_icons_news">
+                <a href="<%=course_news_index_path(@course) %>">通知<span><%=@course.news.count %></span></a>
+                <%= link_to( "",new_course_news_path(@course,:is_new=>1), :class => 'sy_class_add', :title =>"#{l(:label_course_news_new)}") if is_teacher %>
+              </li>
+          <% end %>
+          <% unless show_nav?(course_file_num) %>
+              <li id="sy_05" class="sy_icons_files">
+                <a href="<%=course_files_path(@course) %>">资源库<span><%=course_file_num %></span></a>
+                <% if is_teacher || (@course.publish_resource == 1  && User.current.member_of_course?(@course)) %>
+                    <a class="sy_class_add" title="上传资源" href="javascript:void(0);" onclick="course_files_upload();"> </a>
+                <% end %>
+              </li>
+          <% end %>
+          <% unless show_nav?(course_feedback_count) %>
+              <li id="sy_06" class="sy_icons_feedback">
+                <a href="<%=course_feedback_path(@course) %>">留言<span><%=course_feedback_count %></span></a>
+                <%= link_to "", course_feedback_path(@course), :class => 'sy_class_add', :title =>"#{l(:label_course_feedback)}", :id => "course_jour_count"%>
+              </li>
+          <% end %>
+          <% unless show_nav?(course_poll_count) %>
+              <li id="sy_07" class="sy_icons_poll">
+                <a href="<%=poll_index_path(:polls_type => "Course", :polls_group_id => @course.id) %>">问卷调查<span><%=course_poll_count %></span></a>
+                <%= link_to( "", new_poll_path(:polls_type => "Course",:polls_group_id => @course.id), :class => 'sy_class_add', :title =>"#{l(:label_new_poll)}") if is_teacher %>
+              </li>
+          <% end %>
+          <% count = User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status <> 1").count %>
+          <% unless show_nav?(count) %>
+              <li id="sy_08" class="sy_icons_exercise">
+                <a href="<%=exercise_index_path(:course_id => @course.id) %>">在线测验<span><%=count %></span></a>
+                <%= link_to( "", new_exercise_path(:course_id => @course.id), :class => 'sy_class_add', :title =>"新建试卷") if is_teacher %>
+              </li>
+          <% end %>
+          <% statistics_count = 0 %>
+          <% unless show_nav?(statistics_count) %>
+              <li id="sy_09" class="sy_icons_st">
+                <a href="<%=statistics_course_course_path(@course) %>">统计<span></span></a>
+                <!--<a href="javascript:void(0);" class="sy_class_add"></a>-->
+              </li>
+          <% end %>
+          <%# 工具栏展开 %>
+          <% if @course.homework_commons.count == 0 || @course.news.count == 0 || course_file_num == 0 || course_poll_count == 0 || @course.exercises.count == 0 ||
+                  course_feedback_count == 0 || @course.exercises.count == 0 || (@course.boards.first ? @course.boards.first.topics.count : 0) == 0 || statistics_count == 0%>
+              <li id="expand_tools_expand" class="sy_icons_more"><a href="javascript:void(0)"> 更多</a>
+              </li>
+              <ul class="sub-menu undis" id="navContentCourse">
+                <%= render :partial => 'courses/tool_expand' %>
+              </ul>
+          <% end %>
+        </ul>
+      </div><!--sy_class_leftnav end-->
       <%# 课程活跃度 %>
-      <div class="cl"></div>
       <%= render :partial => 'courses/course_activity_users', :locals => {:course => @course} %>
       <%# 课程英雄榜 %>
       <%= render :partial => 'courses/course_heroes', :locals => {:course => @course} %>
-
-    <% if @course.description && !@course.description.blank? %>
-      <div class="project_intro">
-        <div id="course_description" class="course_description">
-          <h4 ><%= l(:label_course_brief_introduction)%>：</h4>
-          <div id="course_description_content">
-            <%= textilizable(@course.description) if @course.description && !@course.description.blank? %>
-          </div>
-        </div>
-        <div class="lg-foot" id="lg-foot" onclick="show_more_msg();">
-          <label id="expend_more_information"  value="show_more"><%= l(:label_expend_information)%></label>
-          <span class="g-arr-down">
-            <img id="arrow" src="/images/jiantou.jpg" width="12" height="6" />
-          </span>
-        </div>
-      </div><!--项目简介 end-->
-    <% end %>
-      <div class="project_Label">
-        <h4 class="mb5" ><%= l(:label_tag)%>：</h4>
-        <div class="tag_h" >
-          <%= render :partial => 'tags/new_tag', :locals => {:obj => @course, :object_flag => "9"} %>
-        </div>
-        <div class="cl"></div>
-      </div><!--项目标签 end-->
-      <!--课程推荐-->
-      <%= render :partial => 'courses/recommendation', :locals => {:course => @course} %>
-      <div class="fontGrey5 mt10 ml10 mb10">访问计数 <%= @course.visits.to_i %> （自2016年5月）</div>
-    </div><!--LSide end-->
-
-    <div id="RSide" class="fl">
+      <div class="sy_class_leftbox mb15" >
+        <h3>班级推荐</h3>
+        <%= render :partial => 'courses/recommendation', :locals => {:course => @course} %>
+      </div>
+    </div><!--sy_class_l end-->
+    <div class="fl">
       <%= yield %>
-      <%#= render_flash_messages %>
-      <%#= call_hook :view_layouts_base_content %>
-    </div>
-
+    </div><!--sy_class_r end-->
     <div class="cl"></div>
+  </div><!--sy_content end-->
+</div>
 
-  </div><!--Content end-->
-</div><!--Container end-->
-
-    <div class="cl"></div>
-    <%= render :partial => 'layouts/footer' %>
-    <div class="cl"></div>
+<div class="cl"></div>
+<%= render :partial => 'layouts/footer' %>
+<div class="cl"></div>
 
 <%= render :partial => 'layouts/new_feedback' %>
 <div id="ajax-indicator" style="display:none;">
@@ -199,9 +156,15 @@
 <script>
     var blog_artile_list_html = '';
     $(function(){
+        if($("#sy_0<%=@left_nav_type %>").length > 0){
+            $("#sy_0<%=@left_nav_type %> a").addClass('active');
+        } else {
+            $("#expand_tools_expand a").addClass('active');
+            $("#navContentCourse").toggle();
+        }
         $(document).on('input','input[name="course_outline_search"]',function(e){
             throttle(course_outline_search,window,e);
-        })
+        });
         function throttle(method,context,e){
             clearTimeout(method.tId);
             method.tId=setTimeout(function(){
@@ -239,7 +202,7 @@
             })
         }
 
-    })
+    });
     //资源库上传附件
     function course_files_upload(){
             $('#ajax-modal').html('<%= escape_javascript(render :partial => 'files/upload_course_files',:locals => {:course => @course,:course_attachment_type => 1}) %>');
@@ -271,6 +234,9 @@
     }
 
     $("#expand_tools_expand").click(function(){
+        var accordion_head = $('.accordion > li > a');
+        accordion_head.removeClass('active');
+       $("#expand_tools_expand a").addClass('active');
        $("#navContentCourse").toggle();
     });
 </script>
diff --git a/app/views/poll/_poll_form.html.erb b/app/views/poll/_poll_form.html.erb
index 73c783794..27f67c5f7 100644
--- a/app/views/poll/_poll_form.html.erb
+++ b/app/views/poll/_poll_form.html.erb
@@ -363,6 +363,7 @@ function insert_MCQ(quest_type,quest_num,quest_id){
       }
   }
 </script>
+<div class="courseRSide fl">
 <div class=" polls_content polls_edit" id="polls">
 
   <!-- 头部 -->
@@ -431,3 +432,4 @@ function insert_MCQ(quest_type,quest_num,quest_id){
     </select>
   </div>
 </div><!--编辑end-->
+</div>
\ No newline at end of file
diff --git a/app/views/poll/index.html.erb b/app/views/poll/index.html.erb
index e9deff3f4..8b87d737d 100644
--- a/app/views/poll/index.html.erb
+++ b/app/views/poll/index.html.erb
@@ -86,6 +86,8 @@
         hideModal($("#popbox_upload"));
     }
 </script>
+<div class="courseRSide fl">
 <div class="polls_content02" id="polls">
   <%= render :partial => 'poll_list'%>
-</div><!--问卷内容end-->
\ No newline at end of file
+</div><!--问卷内容end-->
+</div>
\ No newline at end of file
diff --git a/app/views/poll/show.html.erb b/app/views/poll/show.html.erb
index 57969faa5..cd85b8067 100644
--- a/app/views/poll/show.html.erb
+++ b/app/views/poll/show.html.erb
@@ -1,4 +1,5 @@
 <%= stylesheet_link_tag  'polls', :media => 'all' %>
+<div class="courseRSide fl">
 <div class="polls_content polls_box" id="polls">
   <div class="ur_page_head" >
     <h1 class="ur_page_title">
@@ -221,3 +222,4 @@
     </div>
   </div>
 </div><!--问卷内容end-->
+</div>
\ No newline at end of file
diff --git a/app/views/poll/statistics_result.html.erb b/app/views/poll/statistics_result.html.erb
index da89bf26e..fb9e9d26b 100644
--- a/app/views/poll/statistics_result.html.erb
+++ b/app/views/poll/statistics_result.html.erb
@@ -1,4 +1,5 @@
 <%= stylesheet_link_tag  'polls', :media => 'all' %>
+<div class="courseRSide fl">
 <div class="polls_content polls_box" id="polls">
   <div class="ur_page_head" >
     <h1 class="ur_page_title">
@@ -32,4 +33,5 @@
     </ul>
     <div class="cl"></div>
   </div>
+</div>
 </div>
\ No newline at end of file
diff --git a/app/views/student_work/index.html.erb b/app/views/student_work/index.html.erb
index 6bdc3753e..3ec6232db 100644
--- a/app/views/student_work/index.html.erb
+++ b/app/views/student_work/index.html.erb
@@ -7,7 +7,7 @@
 <script type="text/javascript">
   $(function(){
       $("#RSide").removeAttr("id");
-      $("#homework_page_right").css("min-height",$("#LSide").height()-30);
+      $("#homework_page_right").css("min-height",$("#courseLSide").height()-33);
       $("#Container").css("width","1000px");
   });
 
diff --git a/config/routes.rb b/config/routes.rb
index 3fe29021b..1124080b7 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1147,6 +1147,7 @@ RedmineApp::Application.routes.draw do
       get 'search_public_orgs_not_in_course'
       get "homework_search"
       get "show_comparecode"
+      get "statistics_course"
     end
     collection do
       match 'join_private_courses', :via => [:get, :post]
diff --git a/public/stylesheets/css/courses.css b/public/stylesheets/css/courses.css
index 4ee419d7b..238b86347 100644
--- a/public/stylesheets/css/courses.css
+++ b/public/stylesheets/css/courses.css
@@ -497,7 +497,7 @@ a:hover.testEdit{ background:url(images/icons.png) -21px -272px  no-repeat;}
 /*20151123课程排行榜Tim*/
 .courseMenuSetting {background:url(/images/homepage_icon2.png) -190px -365px no-repeat; width:15px; height:15px; margin-top:3px; float:right; margin-right:5px;}
 .courseMenuSetting:hover {background:url(/images/homepage_icon2.png) -190px -407px no-repeat;}
-.rankList {width:220px; padding:10px; background-color:#ffffff; margin-top:10px;}
+.rankList {width:208px; background: #fff; border: 1px solid #e5e5e5; border-bottom: none; padding:10px 15px;}
 .rankList li {width:73px; padding:8px 0px 0px 0px; text-align:center; float:left; position:relative;}
 .rankList li p {width:100%; overflow:hidden; white-space:nowrap; text-overflow:ellipsis; color:#585858;word-wrap: normal; word-break: normal;}
 .rankPortrait {border-radius:50%; width:35px; height:35px;}
diff --git a/public/stylesheets/css/public.css b/public/stylesheets/css/public.css
index c3a85418d..73a0ca1c7 100644
--- a/public/stylesheets/css/public.css
+++ b/public/stylesheets/css/public.css
@@ -7,7 +7,7 @@
 /*主内容左右分栏*/
 #LSide{ width:240px;}
 #RSide{ width:670px; background:#fff; padding:10px; margin-left: 10px; margin-bottom:10px;}
-
+.courseRSide{ width:730px; background:#fff; padding:10px; margin-left: 10px; margin-bottom:10px;}
 /*资源库*/
 .resources {width:718px; background-color:#ffffff; padding:15px; border:1px solid #dddddd;float: right}
 .resourcesBanner {width:730px; height:40px; background-color:#eaeaea; margin-bottom:10px;}
diff --git a/public/stylesheets/syllabus.css b/public/stylesheets/syllabus.css
index ede723d93..3b856ad67 100644
--- a/public/stylesheets/syllabus.css
+++ b/public/stylesheets/syllabus.css
@@ -485,7 +485,7 @@ a:hover.sy_btn_orange{
 .accordion li.sy_icons_index > a:before { background-position: 5px 13px; }
 .accordion li.sy_icons_index:hover > a:before,
 .accordion li.sy_icons_index:target > a:before,
-.accordion li.sy_icons_indexs > a.active:before { background-position: -23px 13px; }
+.accordion li.sy_icons_index > a.active:before { background-position: -23px 13px; }
 
 .accordion li.sy_icons_boards > a:before { background-position: 5px -23px; }
 .accordion li.sy_icons_boards:hover > a:before,