diff --git a/common/lib/xmodule/xmodule/annotatable_module.py b/common/lib/xmodule/xmodule/annotatable_module.py
index 338a5fe067..36428d2acb 100644
--- a/common/lib/xmodule/xmodule/annotatable_module.py
+++ b/common/lib/xmodule/xmodule/annotatable_module.py
@@ -39,7 +39,7 @@ class AnnotatableFields(object):
     )
     display_name = String(
         display_name=_("Display Name"),
-        help=_("Display name for this module"),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default=_('Annotation'),
     )
diff --git a/common/lib/xmodule/xmodule/capa_base.py b/common/lib/xmodule/xmodule/capa_base.py
index 783687fc8e..d02627af30 100644
--- a/common/lib/xmodule/xmodule/capa_base.py
+++ b/common/lib/xmodule/xmodule/capa_base.py
@@ -92,7 +92,7 @@ class CapaFields(object):
     """
     display_name = String(
         display_name=_("Display Name"),
-        help=_("This name appears in the horizontal navigation at the top of the page."),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         # it'd be nice to have a useful default but it screws up other things; so,
         # use display_name_with_default for those
diff --git a/common/lib/xmodule/xmodule/conditional_module.py b/common/lib/xmodule/xmodule/conditional_module.py
index a2fa824079..0c7fc1e9d2 100644
--- a/common/lib/xmodule/xmodule/conditional_module.py
+++ b/common/lib/xmodule/xmodule/conditional_module.py
@@ -27,7 +27,7 @@ class ConditionalFields(object):
     has_children = True
     display_name = String(
         display_name=_("Display Name"),
-        help=_("This name appears in the horizontal navigation at the top of the page."),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default=_('Conditional')
     )
diff --git a/common/lib/xmodule/xmodule/html_module.py b/common/lib/xmodule/xmodule/html_module.py
index 903606a5fa..fc310b70d2 100644
--- a/common/lib/xmodule/xmodule/html_module.py
+++ b/common/lib/xmodule/xmodule/html_module.py
@@ -38,7 +38,7 @@ class HtmlBlock(object):
     """
     display_name = String(
         display_name=_("Display Name"),
-        help=_("This name appears in the horizontal navigation at the top of the page."),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         # it'd be nice to have a useful default but it screws up other things; so,
         # use display_name_with_default for those
@@ -329,7 +329,7 @@ class HtmlDescriptor(HtmlBlock, XmlDescriptor, EditingDescriptor):  # pylint: di
 
 class AboutFields(object):
     display_name = String(
-        help=_("Display name for this module"),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default="overview",
     )
@@ -364,7 +364,7 @@ class StaticTabFields(object):
     """
     display_name = String(
         display_name=_("Display Name"),
-        help=_("This name appears in the horizontal navigation at the top of the page."),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default="Empty",
     )
diff --git a/common/lib/xmodule/xmodule/imageannotation_module.py b/common/lib/xmodule/xmodule/imageannotation_module.py
index e9d68ebac1..c9b361b84a 100644
--- a/common/lib/xmodule/xmodule/imageannotation_module.py
+++ b/common/lib/xmodule/xmodule/imageannotation_module.py
@@ -45,7 +45,7 @@ class AnnotatableFields(object):
         """))
     display_name = String(
         display_name=_("Display Name"),
-        help=_("Display name for this module"),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default=_('Image Annotation'),
     )
diff --git a/common/lib/xmodule/xmodule/library_content_module.py b/common/lib/xmodule/xmodule/library_content_module.py
index ae46a775b5..cd06b49ec4 100644
--- a/common/lib/xmodule/xmodule/library_content_module.py
+++ b/common/lib/xmodule/xmodule/library_content_module.py
@@ -60,7 +60,7 @@ class LibraryContentFields(object):
     # to locate input elements - keep synchronized
     display_name = String(
         display_name=_("Display Name"),
-        help=_("Display name for this module"),
+        help=_("The display name for this component."),
         default="Randomized Content Block",
         scope=Scope.settings,
     )
diff --git a/common/lib/xmodule/xmodule/library_root_xblock.py b/common/lib/xmodule/xmodule/library_root_xblock.py
index 6c9466d889..f546f2f14a 100644
--- a/common/lib/xmodule/xmodule/library_root_xblock.py
+++ b/common/lib/xmodule/xmodule/library_root_xblock.py
@@ -25,7 +25,7 @@ class LibraryRoot(XBlock):
     resources_dir = None
 
     display_name = String(
-        help=_("Enter the name of the library as it should appear in Studio."),
+        help=_("The display name for this component."),
         default="Library",
         display_name=_("Library Display Name"),
         scope=Scope.settings
diff --git a/common/lib/xmodule/xmodule/lti_module.py b/common/lib/xmodule/xmodule/lti_module.py
index df02c6ce9c..84153f621c 100644
--- a/common/lib/xmodule/xmodule/lti_module.py
+++ b/common/lib/xmodule/xmodule/lti_module.py
@@ -109,7 +109,7 @@ class LTIFields(object):
     display_name = String(
         display_name=_("Display Name"),
         help=_(
-            "Enter the name that students see for this component.  "
+            "The display name for this component. "
             "Analytics reports may also use the display name to identify this component."
         ),
         scope=Scope.settings,
diff --git a/common/lib/xmodule/xmodule/poll_module.py b/common/lib/xmodule/xmodule/poll_module.py
index 9b86d01ab2..a39cd34a9a 100644
--- a/common/lib/xmodule/xmodule/poll_module.py
+++ b/common/lib/xmodule/xmodule/poll_module.py
@@ -23,20 +23,43 @@ from xmodule.xml_module import XmlDescriptor
 from xblock.fields import Scope, String, Dict, Boolean, List
 
 log = logging.getLogger(__name__)
+_ = lambda text: text
 
 
 class PollFields(object):
     # Name of poll to use in links to this poll
-    display_name = String(help="Display name for this module", scope=Scope.settings)
+    display_name = String(
+        help=_("The display name for this component."),
+        scope=Scope.settings
+    )
 
-    voted = Boolean(help="Whether this student has voted on the poll", scope=Scope.user_state, default=False)
-    poll_answer = String(help="Student answer", scope=Scope.user_state, default='')
-    poll_answers = Dict(help="Poll answers from all students", scope=Scope.user_state_summary)
+    voted = Boolean(
+        help=_("Whether this student has voted on the poll"),
+        scope=Scope.user_state,
+        default=False
+    )
+    poll_answer = String(
+        help=_("Student answer"),
+        scope=Scope.user_state,
+        default=''
+    )
+    poll_answers = Dict(
+        help=_("Poll answers from all students"),
+        scope=Scope.user_state_summary
+    )
 
     # List of answers, in the form {'id': 'some id', 'text': 'the answer text'}
-    answers = List(help="Poll answers from xml", scope=Scope.content, default=[])
+    answers = List(
+        help=_("Poll answers from xml"),
+        scope=Scope.content,
+        default=[]
+    )
 
-    question = String(help="Poll question", scope=Scope.content, default='')
+    question = String(
+        help=_("Poll question"),
+        scope=Scope.content,
+        default=''
+    )
 
 
 class PollModule(PollFields, XModule):
diff --git a/common/lib/xmodule/xmodule/split_test_module.py b/common/lib/xmodule/xmodule/split_test_module.py
index eb127297f8..144460590e 100644
--- a/common/lib/xmodule/xmodule/split_test_module.py
+++ b/common/lib/xmodule/xmodule/split_test_module.py
@@ -58,7 +58,7 @@ class SplitTestFields(object):
 
     display_name = String(
         display_name=_("Display Name"),
-        help=_("This name is used for organizing your course content, but is not shown to students."),
+        help=_("The display name for this component. (Not shown to learners)"),
         scope=Scope.settings,
         default=_("Content Experiment")
     )
diff --git a/common/lib/xmodule/xmodule/tests/test_xml_module.py b/common/lib/xmodule/xmodule/tests/test_xml_module.py
index dcc0f2310d..290d5b1000 100644
--- a/common/lib/xmodule/xmodule/tests/test_xml_module.py
+++ b/common/lib/xmodule/xmodule/tests/test_xml_module.py
@@ -37,8 +37,12 @@ class TestFields(object):
     # Will not be returned by editable_metadata_fields because is not Scope.settings.
     student_answers = Dict(scope=Scope.user_state)
     # Will be returned, and can override the inherited value from XModule.
-    display_name = String(scope=Scope.settings, default='local default', display_name='Local Display Name',
-                          help='local help')
+    display_name = String(
+        scope=Scope.settings,
+        default='local default',
+        display_name='Local Display Name',
+        help='local help'
+    )
     # Used for testing select type, effect of to_json method
     string_select = CrazyJsonString(
         scope=Scope.settings,
diff --git a/common/lib/xmodule/xmodule/textannotation_module.py b/common/lib/xmodule/xmodule/textannotation_module.py
index dfcae252be..beff2b8454 100644
--- a/common/lib/xmodule/xmodule/textannotation_module.py
+++ b/common/lib/xmodule/xmodule/textannotation_module.py
@@ -34,7 +34,7 @@ class AnnotatableFields(object):
         """))
     display_name = String(
         display_name=_("Display Name"),
-        help=_("Display name for this module"),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default=_('Text Annotation'),
     )
diff --git a/common/lib/xmodule/xmodule/video_module/video_xfields.py b/common/lib/xmodule/xmodule/video_module/video_xfields.py
index a24fe56206..cec0036391 100644
--- a/common/lib/xmodule/xmodule/video_module/video_xfields.py
+++ b/common/lib/xmodule/xmodule/video_module/video_xfields.py
@@ -14,7 +14,7 @@ _ = lambda text: text
 class VideoFields(object):
     """Fields for `VideoModule` and `VideoDescriptor`."""
     display_name = String(
-        help=_("The name students see. This name appears in the course ribbon and as a header for the video."),
+        help=_("The display name for this component."),
         display_name=_("Component Display Name"),
         default="Video",
         scope=Scope.settings
diff --git a/common/lib/xmodule/xmodule/videoannotation_module.py b/common/lib/xmodule/xmodule/videoannotation_module.py
index 945d676594..30ad2bfdf7 100644
--- a/common/lib/xmodule/xmodule/videoannotation_module.py
+++ b/common/lib/xmodule/xmodule/videoannotation_module.py
@@ -34,7 +34,7 @@ class AnnotatableFields(object):
         """))
     display_name = String(
         display_name=_("Display Name"),
-        help=_("Display name for this module"),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default=_('Video Annotation'),
     )
diff --git a/common/lib/xmodule/xmodule/word_cloud_module.py b/common/lib/xmodule/xmodule/word_cloud_module.py
index 6e12843efb..e80c556d8f 100644
--- a/common/lib/xmodule/xmodule/word_cloud_module.py
+++ b/common/lib/xmodule/xmodule/word_cloud_module.py
@@ -38,7 +38,7 @@ class WordCloudFields(object):
     """XFields for word cloud."""
     display_name = String(
         display_name=_("Display Name"),
-        help=_("The label for this word cloud on the course page."),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         default="Word cloud"
     )
diff --git a/common/lib/xmodule/xmodule/x_module.py b/common/lib/xmodule/xmodule/x_module.py
index 1a3df2e956..7e707f4884 100644
--- a/common/lib/xmodule/xmodule/x_module.py
+++ b/common/lib/xmodule/xmodule/x_module.py
@@ -66,6 +66,11 @@ STUDIO_VIEW = 'studio_view'
 PREVIEW_VIEWS = [STUDENT_VIEW, AUTHOR_VIEW]
 
 
+# Make '_' a no-op so we can scrape strings. Using lambda instead of
+#  `django.utils.translation.ugettext_noop` because Django cannot be imported in this file
+_ = lambda text: text
+
+
 class OpaqueKeyReader(IdReader):
     """
     IdReader for :class:`DefinitionKey` and :class:`UsageKey`s.
@@ -256,8 +261,8 @@ class XModuleFields(object):
     Common fields for XModules.
     """
     display_name = String(
-        display_name="Display Name",
-        help="This name appears in the horizontal navigation at the top of the page.",
+        display_name=_("Display Name"),
+        help=_("The display name for this component."),
         scope=Scope.settings,
         # it'd be nice to have a useful default but it screws up other things; so,
         # use display_name_with_default for those
diff --git a/lms/djangoapps/grades/migrations/0009_auto_20170111_1507.py b/lms/djangoapps/grades/migrations/0009_auto_20170111_1507.py
new file mode 100644
index 0000000000..d71c45a811
--- /dev/null
+++ b/lms/djangoapps/grades/migrations/0009_auto_20170111_1507.py
@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('grades', '0008_persistentsubsectiongrade_first_attempted'),
+    ]
+
+    operations = [
+        migrations.AlterIndexTogether(
+            name='persistentcoursegrade',
+            index_together=set([('passed_timestamp', 'course_id'), ('modified', 'course_id')]),
+        ),
+        migrations.AlterIndexTogether(
+            name='persistentsubsectiongrade',
+            index_together=set([('modified', 'course_id', 'usage_key')]),
+        ),
+    ]
diff --git a/lms/djangoapps/grades/migrations/0010_auto_20170112_1156.py b/lms/djangoapps/grades/migrations/0010_auto_20170112_1156.py
new file mode 100644
index 0000000000..39cf1fdf49
--- /dev/null
+++ b/lms/djangoapps/grades/migrations/0010_auto_20170112_1156.py
@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('grades', '0009_auto_20170111_1507'),
+    ]
+
+    operations = [
+        migrations.AlterIndexTogether(
+            name='persistentsubsectiongrade',
+            index_together=set([('modified', 'course_id', 'usage_key'), ('first_attempted', 'course_id', 'user_id')]),
+        ),
+    ]
diff --git a/lms/djangoapps/grades/models.py b/lms/djangoapps/grades/models.py
index e95cda16e0..cb21a7539a 100644
--- a/lms/djangoapps/grades/models.py
+++ b/lms/djangoapps/grades/models.py
@@ -253,6 +253,17 @@ class PersistentSubsectionGrade(DeleteGradesMixin, TimeStampedModel):
             # * Course staff can see all grades for a course using (course_id,)
             ('course_id', 'user_id', 'usage_key'),
         ]
+        # Allows querying in the following ways:
+        # (modified): find all the grades updated within a certain timespan
+        # (modified, course_id): find all the grades updated within a timespan for a certain course
+        # (modified, course_id, usage_key): find all the grades updated within a timespan for a subsection
+        #   in a course
+        # (first_attempted, course_id, user_id): find all attempted subsections in a course for a user
+        # (first_attempted, course_id): find all attempted subsections in a course for all users
+        index_together = [
+            ('modified', 'course_id', 'usage_key'),
+            ('first_attempted', 'course_id', 'user_id')
+        ]
 
     # primary key will need to be large for this table
     id = UnsignedBigIntAutoField(primary_key=True)  # pylint: disable=invalid-name
@@ -502,11 +513,14 @@ class PersistentCourseGrade(DeleteGradesMixin, TimeStampedModel):
         # (course_id) for instructors to see all course grades, implicitly created via the unique_together constraint
         # (user_id) for course dashboard; explicitly declared as an index below
         # (passed_timestamp, course_id) for tracking when users first earned a passing grade.
+        # (modified): find all the grades updated within a certain timespan
+        # (modified, course_id): find all the grades updated within a certain timespan for a course
         unique_together = [
             ('course_id', 'user_id'),
         ]
         index_together = [
             ('passed_timestamp', 'course_id'),
+            ('modified', 'course_id')
         ]
 
     # primary key will need to be large for this table
diff --git a/lms/djangoapps/instructor_task/tasks.py b/lms/djangoapps/instructor_task/tasks.py
index 5a24516701..7ad7cf2a60 100644
--- a/lms/djangoapps/instructor_task/tasks.py
+++ b/lms/djangoapps/instructor_task/tasks.py
@@ -193,7 +193,7 @@ def calculate_problem_grade_report(entry_id, xmodule_instance_args):
     return run_main_task(entry_id, task_fn, action_name)
 
 
-@task(base=BaseInstructorTask, routing_key=settings.GRADES_DOWNLOAD_ROUTING_KEY)  # pylint: disable=not-callable
+@task(base=BaseInstructorTask)  # pylint: disable=not-callable
 def calculate_students_features_csv(entry_id, xmodule_instance_args):
     """
     Compute student profile information for a course and upload the
@@ -252,7 +252,7 @@ def proctored_exam_results_csv(entry_id, xmodule_instance_args):
     return run_main_task(entry_id, task_fn, action_name)
 
 
-@task(base=BaseInstructorTask, routing_key=settings.GRADES_DOWNLOAD_ROUTING_KEY)  # pylint: disable=not-callable
+@task(base=BaseInstructorTask)  # pylint: disable=not-callable
 def calculate_may_enroll_csv(entry_id, xmodule_instance_args):
     """
     Compute information about invited students who have not enrolled
@@ -293,7 +293,7 @@ def cohort_students(entry_id, xmodule_instance_args):
     return run_main_task(entry_id, task_fn, action_name)
 
 
-@task(base=BaseInstructorTask, routing_key=settings.GRADES_DOWNLOAD_ROUTING_KEY)  # pylint: disable=not-callable
+@task(base=BaseInstructorTask)  # pylint: disable=not-callable
 def export_ora2_data(entry_id, xmodule_instance_args):
     """
     Generate a CSV of ora2 responses and push it to S3.
diff --git a/openedx/core/lib/xblock_builtin/xblock_discussion/xblock_discussion.py b/openedx/core/lib/xblock_builtin/xblock_discussion/xblock_discussion.py
index 14f83f8c81..44341eef53 100644
--- a/openedx/core/lib/xblock_builtin/xblock_discussion/xblock_discussion.py
+++ b/openedx/core/lib/xblock_builtin/xblock_discussion/xblock_discussion.py
@@ -39,7 +39,7 @@ class DiscussionXBlock(XBlock, StudioEditableXBlockMixin, XmlParserMixin):
     discussion_id = String(scope=Scope.settings, default=UNIQUE_ID)
     display_name = String(
         display_name=_("Display Name"),
-        help=_("Display name for this component"),
+        help=_("The display name for this component."),
         default="Discussion",
         scope=Scope.settings
     )
diff --git a/requirements/edx/github.txt b/requirements/edx/github.txt
index 84c7cc2e1d..17ffa685a9 100644
--- a/requirements/edx/github.txt
+++ b/requirements/edx/github.txt
@@ -72,7 +72,7 @@ git+https://github.com/edx/lettuce.git@0.2.20.002#egg=lettuce==0.2.20.002
 
 # Our libraries:
 git+https://github.com/edx/XBlock.git@xblock-0.4.13#egg=XBlock==0.4.13
--e git+https://github.com/edx/codejail.git@6b17c33a89bef0ac510926b1d7fea2748b73aadd#egg=codejail
+-e git+https://github.com/edx/codejail.git@0b2dc694f05ddc8fee3e65d837cee57b6ce51a6b#egg=codejail==0.0
 -e git+https://github.com/edx/event-tracking.git@0.2.1#egg=event-tracking==0.2.1
 -e git+https://github.com/edx/django-splash.git@v0.2#egg=django-splash==0.2
 -e git+https://github.com/edx/acid-block.git@e46f9cda8a03e121a00c7e347084d142d22ebfb7#egg=acid-xblock
@@ -91,7 +91,7 @@ git+https://github.com/edx/xblock-utils.git@v1.0.3#egg=xblock-utils==1.0.3
 -e git+https://github.com/edx/edx-reverification-block.git@0.0.5#egg=edx-reverification-block==0.0.5
 git+https://github.com/edx/edx-user-state-client.git@1.0.1#egg=edx-user-state-client==1.0.1
 git+https://github.com/edx/xblock-lti-consumer.git@v1.1.0#egg=xblock-lti-consumer==1.1.0
-git+https://github.com/edx/edx-proctoring.git@0.16.2#egg=edx-proctoring==0.16.2
+git+https://github.com/edx/edx-proctoring.git@0.17.0#egg=edx-proctoring==0.17.0
 
 # Third Party XBlocks
 -e git+https://github.com/mitodl/edx-sga@172a90fd2738f8142c10478356b2d9ed3e55334a#egg=edx-sga