diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index c27a57c90..94c8a4ec1 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -62,15 +62,12 @@ class CoursesController < ApplicationController
     if @order == "mine"
       @courses = Course.joins(:course_members)
                        .where("is_delete = 0 AND is_hidden = 0 AND course_members.user_id = ?", @user.id)
-                       .order("courses.id = 1309 DESC, courses.#{order_str} DESC")
     elsif @order == "created_at"
       # REDO:Extension
       @courses = Course.where(is_delete: 0, is_hidden: 0, is_end: 0)
-                       .order("courses.id = 1309 DESC, courses.#{order_str} DESC")
     else
       # REDO:Extension
       @courses = Course.where(is_delete: 0, is_hidden: 0)
-                       .order("courses.id = 1309 DESC, courses.#{order_str} DESC")
     end
 
     # 根据搜索关键字进一步筛选
@@ -89,14 +86,15 @@ class CoursesController < ApplicationController
       @courses = @courses.joins(:school, course_members: :user)
                      .where("#{sql}", keyword: "%#{params[:search]}%").distinct
     end
-    @courses_count = @courses.size
+    @courses_count = @courses.count("courses.id")
+    @courses = @courses.order("courses.id = 1309 DESC, courses.#{order_str} DESC")
 
     # 分页
     page  = params[:page]  || 1
     limit = params[:limit] || 16
 
     @courses = @courses.page(page).per(limit)
-    @courses = @courses.preload(:school, teacher: :user_extension)
+    @courses = @courses.preload(:school, :none_hidden_course_modules, teacher: :user_extension)
   end
 
   def visits_plus_one
diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index 4319f2e4a..4522c64f6 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1316,8 +1316,6 @@ class ExercisesController < ApplicationController
         @exercise_all_users = @exercise.exercise_users
         ex_common_ids = @exercise.common_published_ids(current_user.id)
         @exercise_course_groups = @course.get_ex_published_course(ex_common_ids)
-        @exercise_users_list = @exercise.all_exercise_users(current_user.id)
-        @course_all_members_count = @exercise_users_list.size
 
         #班级的选择
         if params[:exercise_group_id].present?
@@ -1325,6 +1323,10 @@ class ExercisesController < ApplicationController
           exercise_students = @course_all_members.course_find_by_ids("course_group_id",group_id)  # 试卷所分班的全部人数
           user_ids = exercise_students.pluck(:user_id).reject(&:blank?)
           @exercise_all_users = @exercise.exercise_users.exercise_commit_users(user_ids)
+          @course_all_members_count = @exercise_all_users.size
+        else
+          @exercise_users_list = @exercise.all_exercise_users(current_user.id)
+          @course_all_members_count = @exercise_users_list.size
         end
         @exercise_commit_users = @exercise_all_users.commit_exercise_by_status(1)   #试卷的已提交用户
         @exercise_commit_user_ids = @exercise_commit_users.pluck(:user_id).uniq  #已提交试卷的全部用户id
diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index e3b72e62d..ccadba89c 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -448,7 +448,7 @@ class HomeworkCommonsController < ApplicationController
             tip_exception("发布时间不能早于当前时间") if params[:publish_time] <= Time.now.strftime("%Y-%m-%d %H:%M:%S")
             tip_exception("截止时间不能早于当前时间") if params[:end_time] <= Time.now.strftime("%Y-%m-%d %H:%M:%S")
             tip_exception("截止时间不能早于发布时间") if params[:publish_time] > params[:end_time]
-            tip_exception("截止时间不能晚于课堂结束时间") if @course.end_date.present? && params[:end_time] > @course.end_date.end_of_day
+            tip_exception("截止时间不能早于课堂结束时间") if @course.end_date.present? && params[:end_time] > @course.end_date.end_of_day
 
             @homework.unified_setting = 1
             @homework.homework_group_settings.destroy_all
@@ -1086,7 +1086,6 @@ class HomeworkCommonsController < ApplicationController
             homework.publish_time = Time.now
 
             # 截止时间不为空的保持原状，为空的改为一个月后, 非统一设置的更新为最大分班截止时间
-
             if homework.end_time.nil?
               homework.end_time = params[:end_time]
             elsif homework.max_group_end_time
diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index fc1e7874e..4a0c5509d 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -93,6 +93,7 @@ module ExercisesHelper
       if ex.question_type != Exercise::PRACTICAL
         ques_title = ex.question_title
         ques_less_title = nil
+        ex_answers = ex.exercise_answers
         effictive_users = ex_answers.search_answer_users("user_id",user_ids)
       else
         ques_title = ex.shixun.name
@@ -114,12 +115,17 @@ module ExercisesHelper
         ex_choices = ex.exercise_choices
         standard_answer = ex.exercise_standard_answers.pluck(:exercise_choice_id).sort   #标准答案的位置
         right_users_count = 0  #该问题的回答正确的人数
-        user_ids.each do |user_id|
-          ex_choice_ids = effictive_users.map{|e| e.exercise_choice_id if e.user_id == user_id}.reject(&:blank?).uniq
-          answer_choice_array = ex_choices.map{|a| a.choice_position if ex_choice_ids.include?(a.id)}.reject(&:blank?).uniq
-          if answer_choice_array.sort == standard_answer
-            right_users_count += 1
+        if ex.question_type == Exercise::MULTIPLE  #多选题
+          user_ids.each do |user_id|
+            ex_choice_ids = effictive_users.map{|e| e.exercise_choice_id if e.user_id == user_id}.reject(&:blank?).uniq
+            answer_choice_array = ex_choices.map{|a| a.choice_position if ex_choice_ids.include?(a.id)}.reject(&:blank?).uniq
+            if answer_choice_array.sort == standard_answer
+              right_users_count += 1
+            end
           end
+        else  #单选题和判断题
+          standard_answer_choice_id = ex.exercise_choices.find_by(choice_position: standard_answer.first)&.id
+          right_users_count = effictive_users.select{|answer| answer.exercise_choice_id == standard_answer_choice_id}.size
         end
 
         percent = effictive_users_count > 0 ? (right_users_count / effictive_users_count.to_f).round(3)*100 : 0.0
diff --git a/app/models/course.rb b/app/models/course.rb
index b2835fc21..3794a8b2b 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -10,6 +10,7 @@ class Course < ApplicationRecord
   has_many :course_infos, dependent: :destroy
   # 课堂左侧导航栏的模块
   has_many :course_modules, dependent: :destroy
+  has_many :none_hidden_course_modules, -> { not_hidden }, class_name: "CourseModule"
   has_many :board_course_modules, -> { board_module }, class_name: "CourseModule"
   has_many :attachment_course_modules, -> { attachment_module }, class_name: "CourseModule"
   has_many :common_course_modules, -> { common_homework_module }, class_name: "CourseModule"
@@ -310,15 +311,13 @@ class Course < ApplicationRecord
   #获取试卷/问卷已发布的班级id，名称和人数。当为统一设置时，显示全部，否则只显示当前已发布的班级信息
   def get_ex_published_course(common_ids)
     teacher_power_courses = []
-    if course_groups.present?
-      common_ids.each do |i|
-        if i == 0
-          student_count = students.where(course_group_id:i).count
-          teacher_power_courses << {course_name:"未分班",course_id:0,student_count:student_count}
-        else
-          course_group_name = course_groups.find_by(id:i)
-          teacher_power_courses << {course_name:course_group_name&.name,course_id:i,student_count:course_group_name&.course_members_count}
-        end
+    publish_groups = course_groups.where(id: common_ids)
+    if common_ids.include?(0)
+      teacher_power_courses << {course_name:"未分班", course_id: 0, student_count: none_group_count}
+    end
+    if publish_groups.present?
+      publish_groups.each do |group|
+        teacher_power_courses << {course_name: group&.name,course_id: group&.id, student_count: group&.course_members_count}
       end
     end
     teacher_power_courses
diff --git a/app/views/courses/index.json.jbuilder b/app/views/courses/index.json.jbuilder
index 2b6866517..32a7047b7 100644
--- a/app/views/courses/index.json.jbuilder
+++ b/app/views/courses/index.json.jbuilder
@@ -11,5 +11,6 @@ json.courses @courses do |course|
     json.is_public course.is_public
     json.is_accessible course.is_public == 1 || @user.course_identity(course) < Course::NORMAL
     json.is_end course.is_end
+    json.first_category_url module_url(course.none_hidden_course_modules.first, course)
 end
 json.courses_count @courses_count