Index: lams_tool_whiteboard/conf/language/lams/ApplicationResources.properties
===================================================================
diff -u -r66073df9d060c655481967312c70b03b1c858e42 -ra8424bd8d5f88aa4bebe2ef1534ca678e56cfc42
--- lams_tool_whiteboard/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision 66073df9d060c655481967312c70b03b1c858e42)
+++ lams_tool_whiteboard/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision a8424bd8d5f88aa4bebe2ef1534ca678e56cfc42)
@@ -93,6 +93,8 @@
 monitoring.summary.gallery.walk.start.confirm = Are you sure you want to finish collaboration phase and start Gallery Walk?
 monitoring.summary.gallery.walk.finish = Finish Gallery Walk
 monitoring.summary.gallery.walk.finish.confirm = Are you sure you want to finish Gallery Walk?
+monitoring.summary.learner.reedit = Let learner modify answers
+monitoring.summary.learner.reedit.confirm = Are you sure you want allows students to modify their answers again?
 label.gallery.walk = Gallery Walk
 label.gallery.walk.wait.finish = The Gallery Walk activity has not been set as completed by the teacher. If you have completed, please contact the teacher for assistance.
 label.rating = Rating
Index: lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/service/IWhiteboardService.java
===================================================================
diff -u -r5739216c21c85ff9b4b11cba522b5ffd2875d55c -ra8424bd8d5f88aa4bebe2ef1534ca678e56cfc42
--- lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/service/IWhiteboardService.java	(.../IWhiteboardService.java)	(revision 5739216c21c85ff9b4b11cba522b5ffd2875d55c)
+++ lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/service/IWhiteboardService.java	(.../IWhiteboardService.java)	(revision a8424bd8d5f88aa4bebe2ef1534ca678e56cfc42)
@@ -131,6 +131,8 @@
 
     void finishGalleryWalk(long toolContentId) throws IOException;
 
+    void learnerReedit(long toolContentId) throws IOException;
+
     void changeLeaderForGroup(long toolSessionId, long leaderUserId);
 
     Grouping getGrouping(long toolContentId);
Index: lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/service/WhiteboardService.java
===================================================================
diff -u -r5739216c21c85ff9b4b11cba522b5ffd2875d55c -ra8424bd8d5f88aa4bebe2ef1534ca678e56cfc42
--- lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/service/WhiteboardService.java	(.../WhiteboardService.java)	(revision 5739216c21c85ff9b4b11cba522b5ffd2875d55c)
+++ lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/service/WhiteboardService.java	(.../WhiteboardService.java)	(revision a8424bd8d5f88aa4bebe2ef1534ca678e56cfc42)
@@ -507,6 +507,20 @@
 	sendGalleryWalkRefreshRequest(whiteboard);
     }
 
+    @Override
+    public void learnerReedit(long toolContentId) throws IOException {
+	Whiteboard whiteboard = getWhiteboardByContentId(toolContentId);
+	if (!whiteboard.isGalleryWalkEnabled()) {
+	    throw new IllegalArgumentException(
+		    "Can not allow learners to reedit activity as Gallery Walk is not enabled for Wwith tool content ID "
+			    + toolContentId);
+	}
+	whiteboard.setGalleryWalkStarted(false);
+	whiteboardDao.update(whiteboard);
+
+	sendGalleryWalkRefreshRequest(whiteboard);
+    }
+
     private void sendGalleryWalkRefreshRequest(Whiteboard whiteboard) {
 	ObjectNode jsonCommand = JsonNodeFactory.instance.objectNode();
 	jsonCommand.put("hookTrigger", "whiteboard-refresh-" + whiteboard.getContentId());
Index: lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/web/controller/MonitoringController.java
===================================================================
diff -u -r5739216c21c85ff9b4b11cba522b5ffd2875d55c -ra8424bd8d5f88aa4bebe2ef1534ca678e56cfc42
--- lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/web/controller/MonitoringController.java	(.../MonitoringController.java)	(revision 5739216c21c85ff9b4b11cba522b5ffd2875d55c)
+++ lams_tool_whiteboard/src/java/org/lamsfoundation/lams/tool/whiteboard/web/controller/MonitoringController.java	(.../MonitoringController.java)	(revision a8424bd8d5f88aa4bebe2ef1534ca678e56cfc42)
@@ -279,6 +279,13 @@
 	whiteboardService.finishGalleryWalk(toolContentId);
     }
 
+    @RequestMapping("/learnerReedit")
+    private void learnerReedit(HttpServletRequest request) throws IOException {
+	Long toolContentId = WebUtil.readLongParam(request, WhiteboardConstants.ATTR_TOOL_CONTENT_ID, false);
+
+	whiteboardService.learnerReedit(toolContentId);
+    }
+
     @RequestMapping(path = "/updateTimeLimit", method = RequestMethod.POST)
     @ResponseStatus(HttpStatus.OK)
     public void updateTimeLimit(@RequestParam(name = AttributeNames.PARAM_TOOL_CONTENT_ID) long toolContentId,
Index: lams_tool_whiteboard/web/pages/monitoring/summary.jsp
===================================================================
diff -u -r5739216c21c85ff9b4b11cba522b5ffd2875d55c -ra8424bd8d5f88aa4bebe2ef1534ca678e56cfc42
--- lams_tool_whiteboard/web/pages/monitoring/summary.jsp	(.../summary.jsp)	(revision 5739216c21c85ff9b4b11cba522b5ffd2875d55c)
+++ lams_tool_whiteboard/web/pages/monitoring/summary.jsp	(.../summary.jsp)	(revision a8424bd8d5f88aa4bebe2ef1534ca678e56cfc42)
@@ -344,10 +344,10 @@
 				toolContentID : ${whiteboard.contentId}
 			},
 			'success' : function(){
-				$('#whiteboard-monitoring-summary-${sessionMap.toolContentID} #gallery-walk-start, ' +
-				  '#whiteboard-monitoring-summary-${sessionMap.toolContentID} #countdown, ' + 
-				  '#whiteboard-monitoring-summary-${sessionMap.toolContentID} #add-one-minute, #start-activity').hide();
-				$('#whiteboard-monitoring-summary-${sessionMap.toolContentID} #gallery-walk-finish').removeClass('hidden');
+				let summaryPane = $('#whiteboard-monitoring-summary-${sessionMap.toolContentID}');
+				
+				$('#gallery-walk-start', summaryPane).hide();
+				$('#gallery-walk-finish, #learner-reedit', summaryPane).removeClass('hidden');
 			}
 		});
 	}
@@ -379,7 +379,30 @@
 		});
 	}
 
-
+	function learnerReedit(){
+		if (!confirm('<fmt:message key="monitoring.summary.learner.reedit.confirm" />')) {
+			return;
+		}
+		
+		$.ajax({
+			'url' : '<c:url value="/monitoring/learnerReedit.do"/>',
+			'data': {
+				toolContentID : ${whiteboard.contentId}
+			},
+			'success' : function(){
+				<c:choose>
+					<c:when test="${isTbl}">
+						// reload current tab with Doku summary
+						loadTab(null, null, false);
+					</c:when>
+					<c:otherwise>
+						location.reload();
+					</c:otherwise>
+				</c:choose>
+			}
+		});
+	}
+	
 	function showChangeLeaderModal(toolSessionId) {
 		$('#whiteboard-monitoring-summary-${sessionMap.toolContentID} #change-leader-modals').empty()
 		.load('<c:url value="/monitoring/displayChangeLeaderForGroupDialogFromActivity.do" />',{
@@ -788,6 +811,12 @@
 					<fmt:message key="monitoring.summary.gallery.walk.start" /> 
 				</button>
 				
+				<button id="learner-reedit" type="button"
+				        class="btn btn-default ${whiteboard.galleryWalkStarted and not whiteboard.galleryWalkFinished ? '' : 'hidden'}"
+				        onClick="javascript:learnerReedit()">
+					<fmt:message key="monitoring.summary.learner.reedit" /> 
+				</button>
+				
 				<button id="gallery-walk-finish" type="button"
 				        class="btn btn-default ${whiteboard.galleryWalkStarted and not whiteboard.galleryWalkFinished ? '' : 'hidden'}"
 				        onClick="javascript:finishGalleryWalk()">