diff --git a/common/lib/capa/capa/responsetypes.py b/common/lib/capa/capa/responsetypes.py
index d1b58e53a9..13a0bec3a2 100644
--- a/common/lib/capa/capa/responsetypes.py
+++ b/common/lib/capa/capa/responsetypes.py
@@ -726,7 +726,7 @@ class NumericalResponse(LoncapaResponse):
         # I think this is just pyparsing.ParseException, calc.UndefinedVariable:
         # But we'd need to confirm
         except:
-            raise StudentInputError("Invalid input: could not parse '%s' as a number" %\
+            raise StudentInputError("Invalid input: could not interpret '%s' as a number" %\
                                     cgi.escape(student_answer))
 
         if correct:
@@ -920,6 +920,7 @@ def sympy_check2():
                 print "oops in customresponse (code) error %s" % err
                 print "context = ", self.context
                 print traceback.format_exc()
+                raise StudentInputError("Error: Problem could not be evaluated with your input") # Notify student
         else:					# self.code is not a string; assume its a function
 
             # this is an interface to the Tutor2 check functions
diff --git a/common/lib/xmodule/xmodule/js/src/sequence/display.coffee b/common/lib/xmodule/xmodule/js/src/sequence/display.coffee
index ab337d9b7e..25d69ccca3 100644
--- a/common/lib/xmodule/xmodule/js/src/sequence/display.coffee
+++ b/common/lib/xmodule/xmodule/js/src/sequence/display.coffee
@@ -87,6 +87,8 @@ class @Sequence
       XModule.loadModules('display', @$('#seq_content'))
 
       MathJax.Hub.Queue(["Typeset", MathJax.Hub, "seq_content"]) # NOTE: Actually redundant. Some other MathJax call also being performed
+      window.update_schematics() # For embedded circuit simulator exercises in 6.002x
+
       @position = new_position
       @toggleArrows()
       @hookUpProgressEvent()
diff --git a/lms/djangoapps/courseware/module_render.py b/lms/djangoapps/courseware/module_render.py
index ee29491d27..b8416426b6 100644
--- a/lms/djangoapps/courseware/module_render.py
+++ b/lms/djangoapps/courseware/module_render.py
@@ -62,7 +62,7 @@ def toc_for_course(user, request, course, active_chapter, active_section, course
 
     where SECTIONS is a list
     [ {'display_name': name, 'url_name': url_name,
-       'format': format, 'due': due, 'active' : bool}, ...]
+       'format': format, 'due': due, 'active' : bool, 'graded': bool}, ...]
 
     active is set for the section and chapter corresponding to the passed
     parameters, which are expected to be url_names of the chapter+section.
@@ -98,7 +98,9 @@ def toc_for_course(user, request, course, active_chapter, active_section, course
                                  'url_name': section.url_name,
                                  'format': section.metadata.get('format', ''),
                                  'due': section.metadata.get('due', ''),
-                                 'active': active})
+                                 'active': active,
+                                 'graded': section.metadata.get('graded', False),
+                                 })
 
         chapters.append({'display_name': chapter.display_name,
                          'url_name': chapter.url_name,
diff --git a/lms/static/images/graded.png b/lms/static/images/graded.png
new file mode 100644
index 0000000000..a1220159f8
Binary files /dev/null and b/lms/static/images/graded.png differ
diff --git a/lms/static/sass/course/courseware/_sidebar.scss b/lms/static/sass/course/courseware/_sidebar.scss
index 52a639d9a6..27040bece5 100644
--- a/lms/static/sass/course/courseware/_sidebar.scss
+++ b/lms/static/sass/course/courseware/_sidebar.scss
@@ -180,6 +180,18 @@ section.course-index {
             font-weight: normal;
           }
         }
+
+        &.graded {
+         > a {
+           background-image: url('../images/graded.png');
+           background-repeat: no-repeat;
+           background-position: 97% center;
+          }
+
+          &.active > a {
+            @include background-image(url('../images/graded.png'), linear-gradient(top, #e6e6e6, #d6d6d6));
+          }
+        }
       }
     }
   }
diff --git a/lms/templates/accordion.html b/lms/templates/accordion.html
index 0d3dee9495..fa91927462 100644
--- a/lms/templates/accordion.html
+++ b/lms/templates/accordion.html
@@ -7,7 +7,7 @@
 
     <ul>
       % for section in chapter['sections']:
-          <li${' class="active"' if 'active' in section and section['active'] else ''}>
+          <li class="${'active' if 'active' in section and section['active'] else ''} ${'graded'  if 'graded' in section and section['graded'] else ''}">
             <a href="${reverse('courseware_section', args=[course_id, chapter['url_name'], section['url_name']])}">
               <p>${section['display_name']}
               <span class="subtitle">