diff --git a/Gemfile b/Gemfile
index 91e72a745..f462133c3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,6 +16,8 @@ gem "coderay", "~> 1.0.6"
 gem "fastercsv", "~> 1.5.0", :platforms => [:mri_18, :mingw_18, :jruby]
 gem "builder", "3.0.0"
 gem 'acts-as-taggable-on', '2.4.1'
+gem 'spreadsheet'
+gem 'ruby-ole'
 
 group :development do
   gem 'better_errors', path: 'lib/better_errors'
diff --git a/app/controllers/bids_controller.rb b/app/controllers/bids_controller.rb
index b06010ecb..ec2fb7d77 100644
--- a/app/controllers/bids_controller.rb
+++ b/app/controllers/bids_controller.rb
@@ -494,7 +494,7 @@ class BidsController < ApplicationController
         @is_teacher = is_course_teacher(User.current,@bid.courses.first)
         if @is_teacher
           all_homework_list = HomeworkAttach.find_by_sql("SELECT * FROM (SELECT homework_attaches.*,
-              (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+              (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
               (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
               FROM homework_attaches WHERE bid_id = #{@bid.id} ORDER BY s_score DESC,created_at ASC) AS table1
               WHERE table1.t_score IS NULL")
@@ -502,7 +502,7 @@ class BidsController < ApplicationController
           @cur_type = 1
         else
           all_homework_list = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
-              (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+              (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
               (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score,
               (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id = #{User.current.id} AND is_teacher_score = #{@is_teacher ? 1 : 0}) AS m_score
               FROM homework_attaches
diff --git a/app/controllers/homework_attach_controller.rb b/app/controllers/homework_attach_controller.rb
index c979aded7..0cfa216e8 100644
--- a/app/controllers/homework_attach_controller.rb
+++ b/app/controllers/homework_attach_controller.rb
@@ -48,7 +48,7 @@ class HomeworkAttachController < ApplicationController
       order_by = "created_at #{direction}"
     end
     all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT * FROM (SELECT homework_attaches.*,
-            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 and stars IS NOT NULL) AS t_score,
+            (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
             FROM homework_attaches WHERE bid_id = #{@bid.id}
             ORDER BY #{order_by}) AS table1
@@ -80,7 +80,7 @@ class HomeworkAttachController < ApplicationController
       order_by = "created_at #{direction}"
     end
     all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT homework_attaches.*,
-            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+            (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
             FROM homework_attaches WHERE bid_id = #{@bid.id}
             ORDER BY #{order_by}")
@@ -101,7 +101,7 @@ class HomeworkAttachController < ApplicationController
   def get_student_batch_homework
     @is_student_batch_homework = true
     all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT homework_attaches.*,
-          (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+          (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
           (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score,
           (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id = #{User.current.id}  AND is_teacher_score = 0) AS m_score
           FROM homework_attaches
@@ -119,14 +119,14 @@ class HomeworkAttachController < ApplicationController
   def get_my_homework
     @is_my_homework = true
     all_homework_list = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
-        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+        (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
         (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
         FROM homework_attaches
         WHERE homework_attaches.bid_id = #{@bid.id} AND homework_attaches.user_id = #{User.current.id}")
     #如果我没有创建过作业，就检索我是否参与了某个作业
     if all_homework_list.empty?
       all_homework_list = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
-        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+        (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
         (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
         FROM homework_attaches
         INNER JOIN homework_users ON homework_users.homework_attach_id = homework_attaches.id
@@ -435,17 +435,19 @@ class HomeworkAttachController < ApplicationController
     @is_teacher,@is_anonymous_comments,@m_score = params[:is_teacher]=="true",params[:is_anonymous_comments]=="true",params[:stars_value]
     @cur_page,@cur_type = params[:cur_page] || 1,params[:cur_type] || 5
     @homework = HomeworkAttach.find(params[:homework_id])
+    @stars_reates = @homework.rates(:quality)
     homework = @homework
     is_teacher = @is_teacher ? 1 : 0
     #保存评分@homework.rate(@m_score.to_i,User.current.id,:quality, (@is_teacher ? 1 : 0))
-    if @m_score
-      rate = @homework.rates(:quality).where(:rater_id => User.current.id, :is_teacher_score => is_teacher).first
+    rate = @homework.rates(:quality).where(:rater_id => User.current.id, :is_teacher_score => is_teacher).first
+    if @m_score && rate.stars != @m_score
       if rate
         rate.stars = @m_score
         rate.save!
       else
         @homework.rates(:quality).new(:stars => @m_score, :rater_id => User.current.id, :is_teacher_score => is_teacher).save!
       end
+
       if homework.is_teacher_score == 0
         if is_teacher == 1
           homework.score = @m_score
@@ -470,7 +472,6 @@ class HomeworkAttachController < ApplicationController
       @homework.addjours User.current.id, params[:new_form][:user_message],0,@is_comprehensive_evaluation
     end
 
-    @stars_reates = @homework.rates(:quality)
     @teacher_stars = @stars_reates.where("is_teacher_score = 1") #老师评分列表
     @student_stars = @stars_reates.where("is_teacher_score = 0") #学生评分列表
     jours = @homework.journals_for_messages.where("is_comprehensive_evaluation = 3 or is_comprehensive_evaluation is null").order("created_on DESC")#jours留言 is null条件用以兼容历史数据
@@ -481,18 +482,18 @@ class HomeworkAttachController < ApplicationController
       get_not_batch_homework_list "s_socre","desc",@homework.bid_id
     elsif @cur_type == "2" #老师已批列表
       @result_homework = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
-            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 and stars IS NOT NULL) AS t_score,
+            (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
             FROM homework_attaches WHERE id = #{@homework.id}").first
     elsif @cur_type == "3" #全部作业列表
       @result_homework = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
-            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+            (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
             (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
             FROM homework_attaches WHERE id = #{@homework.id}").first
     elsif @cur_type == "4" #匿评作业列表
       @is_student_batch_homework = true
       @result_homework = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
-          (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+          (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
           (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score,
           (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id = #{User.current.id}  AND is_teacher_score = #{is_teacher}) AS m_score
           FROM homework_attaches
@@ -596,7 +597,7 @@ class HomeworkAttachController < ApplicationController
       order_by = "created_at #{direction}"
     end
     @all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT * FROM (SELECT homework_attaches.*,
-        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1) AS t_score,
+        (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 1 AND stars IS NOT NULL ORDER BY updated_at DESC limit 0,1) AS t_score,
         (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND is_teacher_score = 0) AS s_score
         FROM homework_attaches WHERE bid_id = #{bid_id}
         ORDER BY #{order_by}) AS table1
diff --git a/app/views/courses/_member_list.html.erb b/app/views/courses/_member_list.html.erb
index 07eed7170..41b4f41e7 100644
--- a/app/views/courses/_member_list.html.erb
+++ b/app/views/courses/_member_list.html.erb
@@ -36,6 +36,8 @@
               <a href="#" >加入时间</a>
             </li>
         <% else %>
+            <li class="ml50">
+            </li>
             <li class="ml50" style="margin-left: 470px">
             </li>
             <li class="ml50" style="margin-left: 80%">
diff --git a/app/views/layouts/base.html.erb b/app/views/layouts/base.html.erb
index 460020393..bcc7a1c90 100644
--- a/app/views/layouts/base.html.erb
+++ b/app/views/layouts/base.html.erb
@@ -22,7 +22,6 @@
 <div id="wrapper2">
 <div id="wrapper3">
 <%=render :partial => 'layouts/base_header'%>
-<%= render :partial => 'layouts/base_ad' %>
 <div id="main" class="nosidebar">
     <div id="content_">
         <%= render_flash_messages %>
diff --git a/app/views/layouts/base_courses.html.erb b/app/views/layouts/base_courses.html.erb
index 978eb7e35..fc3484b0a 100644
--- a/app/views/layouts/base_courses.html.erb
+++ b/app/views/layouts/base_courses.html.erb
@@ -285,7 +285,7 @@
         <%= link_to l(:label_course_file), course_files_path(@course), :class => link_class(:files) %>
       </li>
       <li>
-        <%= link_to l(:label_course_news), {:controller => 'news', :action => 'index', :course_id => @course}, :class => link_class(:news) %>
+        <%= link_to l(:label_course_news), course_news_index_path(@course), :class => link_class(:news) %>
       </li>
       <li>
         <%= link_to l(:label_course_board), {:controller => 'boards', :action => 'index', :course_id => @course}, :class => link_class(:boards) %>