diff --git a/app/controllers/admin_controller.rb b/app/controllers/admin_controller.rb
index 98b63f8fe..0463e08e8 100644
--- a/app/controllers/admin_controller.rb
+++ b/app/controllers/admin_controller.rb
@@ -62,7 +62,7 @@ class AdminController < ApplicationController
       course = Course.where("id = #{params[:course_id].to_i}").first
       unless course.nil?
         course.update_column('syllabus_id', params[:syllabus_id].to_i)
-        logger.error "update_syllabus_id: admin_controller/select_scourse_syllabus"
+        Rails.logger.error "update_syllabus_id: admin_controller/select_scourse_syllabus"
         @flag = true
       end
     end
@@ -84,7 +84,7 @@ class AdminController < ApplicationController
         syllabus.description = Message.where("id = 19412").first.nil? ? nil : Message.where("id = 19412").first.content
         if syllabus.save
           course.update_column('syllabus_id', syllabus.id)
-          logger.error "update_syllabus_id: admin_controller/create_syllabus"
+          Rails.logger.error "update_syllabus_id: admin_controller/create_syllabus"
           @flag = params[:flag].to_i
           @course = course
           respond_to do |format|
diff --git a/app/services/courses_service.rb b/app/services/courses_service.rb
index 58b6897ad..e9253ff90 100644
--- a/app/services/courses_service.rb
+++ b/app/services/courses_service.rb
@@ -353,7 +353,7 @@ class CoursesService
       #@course.password = params[:course][:password]
       @course.tea_id = current_user.id
       @course.syllabus_id = params[:syllabus_id].to_i
-      logger.error "update_syllabus_id: courses_service/create_course"
+      Rails.logger.error "update_syllabus_id: courses_service/create_course"
       @course.term = params[:term]
       @course.time = params[:time]
       @course.end_term = params[:end_term]
@@ -413,7 +413,7 @@ class CoursesService
     #course.safe_attributes = params[:course]
     #course.password = params[:course][:password]
     course.syllabus_id = params[:syllabus_id].to_i
-    logger.error "update_syllabus_id: courses_service/edit_course"
+    Rails.logger.error "update_syllabus_id: courses_service/edit_course"
     course.time = params[:time]
     course.term = params[:term]
     course.end_time = params[:end_time]
diff --git a/app/services/syllabuses_service.rb b/app/services/syllabuses_service.rb
index 8911032dd..4681917fc 100644
--- a/app/services/syllabuses_service.rb
+++ b/app/services/syllabuses_service.rb
@@ -86,14 +86,14 @@ class SyllabusesService
       courses.each do |course|
         if ::Course === course
           course.syllabus_id = sy.id
-          logger.error "update_syllabus_id: syllabus_service/create"
+          Rails.logger.error "update_syllabus_id: syllabus_service/create"
           course.save!
           send_wechat_create_class_notice user,course
         elsif Hash === course
           c = ::Course.new(course)
           c.tea_id = user.id
           c.syllabus_id = sy.id
-          logger.error "update_syllabus_id: syllabus_service/create"
+          Rails.logger.error "update_syllabus_id: syllabus_service/create"
           c.update_default_value
           c.is_public = 0
           c.save!
@@ -138,7 +138,7 @@ class SyllabusesService
         course.name = c
         course.tea_id = user.id
         course.syllabus_id = sy.id
-        logger.error "update_syllabus_id: syllabus_service/edit"
+        Rails.logger.error "update_syllabus_id: syllabus_service/edit"
         course.update_default_value
         course.is_public = 0
         course.save!
diff --git a/app/views/layouts/_course_base_info.html.erb b/app/views/layouts/_course_base_info.html.erb
index 09832b66c..f661571f6 100644
--- a/app/views/layouts/_course_base_info.html.erb
+++ b/app/views/layouts/_course_base_info.html.erb
@@ -3,8 +3,6 @@
 <% student_num = studentCount(@course) %>
 <% course_file_num = visable_attachemnts_incourse(@course).count %>
 <p class="sy_cgrey mb10">
-  <%= link_to(@course.teacher.show_name, user_path(@course.teacher), :class => 'sy_cgrey') %>
-  &nbsp;&gt;&nbsp;
   <% if @course.syllabus %>
       <%=link_to @course.syllabus.title, syllabus_path(@course.syllabus_id), :class => 'sy_cgrey' %>
       &nbsp;&gt;&nbsp;