diff --git a/app/helpers/welcome_helper.rb b/app/helpers/welcome_helper.rb
index 1004a49a..4ff5a48e 100644
--- a/app/helpers/welcome_helper.rb
+++ b/app/helpers/welcome_helper.rb
@@ -141,27 +141,26 @@ module WelcomeHelper
       Course.active.visible.
           joins(:memberships).
           group('members.course_id').
-          reorder("courses.time DESC, COUNT(members.course_id) DESC").take sum
-
+          reorder("courses.created_at DESC, COUNT(members.course_id) DESC").take sum
     else
       if school_id.nil?
         Course.active.visible.
             joins(:memberships).
             where("#{Course.table_name}.school_id = ?", User.current.user_extensions.school.id).
             group('members.course_id').
-            reorder("courses.time DESC, COUNT(members.course_id) DESC").take sum
+            reorder("courses.created_at DESC, COUNT(members.course_id) DESC").take sum
       else
         if school_id == "0"
           Course.active.visible.
               joins(:memberships).
               group('members.course_id').
-              reorder("courses.time DESC, COUNT(members.course_id) DESC").take sum
+              reorder("courses.created_at DESC, COUNT(members.course_id) DESC").take sum
         else
           Course.active.visible.
               joins(:memberships).
               where("#{Course.table_name}.school_id = ?", school_id).
               group('members.course_id').
-              reorder("courses.time DESC, COUNT(members.course_id) DESC").take sum
+              reorder("courses.created_at DESC, COUNT(members.course_id) DESC").take sum
         end
       end
     end
diff --git a/app/views/welcome/course.html.erb b/app/views/welcome/course.html.erb
index e79cc12c..624bd01d 100644
--- a/app/views/welcome/course.html.erb
+++ b/app/views/welcome/course.html.erb
@@ -73,7 +73,7 @@
 <div id="J_Slide" class="d-p-index-box d-p-index-hotproject">
   <h3><strong>新开课程</strong></h3>
   <% if @school_id %>
-      <% school_course = find_miracle_course(10, 7, @school_id) %>
+      <% school_course = find_miracle_course(10,7, @school_id) %>
   <% else %>
       <%school_course=[]%>
   <% end %>
@@ -138,6 +138,7 @@
         </ul>
         <ul class="d-p-projectlist">
           <% school_course.map do |course| %>
+              <% if course.school%>
               <li class='<%= cycle("odd", "even") %>' title=<%= course.description.to_s %>>
                 <div class='avatar'>
                   <%= image_tag(get_course_avatar(course), :class => "avatar-4") %>
@@ -167,6 +168,7 @@
                   <% end %>
                 </div>
               </li>
+                  <%end%>
           <% end; reset_cycle %>
           <% if school_course.count < 9 %>
               <li>