Index: lams_monitoring/conf/language/lams/ApplicationResources.properties
===================================================================
diff -u -r1e3a5fea1c7260ba7ed4f8e13da8412b7e84c841 -r35ee206c5d47a350ae59a47321a2c11a96af6f04
--- lams_monitoring/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision 1e3a5fea1c7260ba7ed4f8e13da8412b7e84c841)
+++ lams_monitoring/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision 35ee206c5d47a350ae59a47321a2c11a96af6f04)
@@ -287,6 +287,7 @@
 learner.finished.count  =Finished Learners: [0] of [1]
 learner.finished.dialog.title  =End of lesson
 learner.group.sort.button  =Sort
+learner.group.select.all =Select/Unselect all
 button.force.complete  =Force complete
 button.view.learner  =View learner
 button.close  =Close
Index: lams_monitoring/web/includes/javascript/monitorLesson.js
===================================================================
diff -u -rf992a141ad8dac72d1db43fbe4a7ed460a093dd0 -r35ee206c5d47a350ae59a47321a2c11a96af6f04
--- lams_monitoring/web/includes/javascript/monitorLesson.js	(.../monitorLesson.js)	(revision f992a141ad8dac72d1db43fbe4a7ed460a093dd0)
+++ lams_monitoring/web/includes/javascript/monitorLesson.js	(.../monitorLesson.js)	(revision 35ee206c5d47a350ae59a47321a2c11a96af6f04)
@@ -992,16 +992,38 @@
  */
 function fillClassDialogList(listId, users, disableCreator) {
 	var list = $('#' + listId + 'List').empty();
+	var selectAllInitState = true;
+	
 	$.each(users, function(userIndex, user) {
 		var checkbox = $('<input />').attr({
 	    	 'type' : 'checkbox'
+	      }).change(function(){
+	    	var itemState = $(this).is(':checked');
+	    	if (itemState) {
+	    		var selectAllState = true;
+	    		$('input', list).each(function(){
+	    			if (!$(this).is(':checked')) {
+	    				selectAllState = false;
+	    				return false;
+	    			}
+	    		});
+	    		
+	    		if (selectAllState) {
+	    			$('#' + listId + 'SelectAll').attr('checked', 'checked');
+	    		}
+	    	} else {
+	    		$('#' + listId + 'SelectAll').attr('checked', null);
+	    	}
+	    	
 	      });
 		if (user.classMember) {
 			checkbox.attr('checked', 'checked');
 			if (disableCreator && user.lessonCreator) {
 				// user creator must not be deselected
 				checkbox.attr('disabled', 'disabled');
 			}
+		} else {
+			selectAllInitState = false;
 		}
 		
 		var userDiv = $('<div />').attr({
@@ -1022,6 +1044,8 @@
 		    })
 		}
 	});	
+
+	$('#' + listId + 'SelectAll').attr('checked', selectAllInitState ? 'checked' : null);
 }
 
 
@@ -1410,7 +1434,12 @@
 	}
 }
 
+function selectAllInDialogList(listId) {
+	var targetState = $('#' + listId + 'SelectAll').is(':checked') ? 'checked' : null;
+	$('#' + listId + 'List input').attr('checked', targetState);
+}
 
+
 function colorDialogList(listId) {
 	$('#' + listId + 'List div.dialogListItem').each(function(userIndex, userDiv){
 		// every odd learner has different background