diff --git a/admin/static/js/app.js b/admin/static/js/app.js
index 9d2b072c..b2f98356 100644
--- a/admin/static/js/app.js
+++ b/admin/static/js/app.js
@@ -485,15 +485,33 @@ angular.module("FICApp")
 	}
     })
 
-    .controller("ThemesListController", function($scope, Theme, $location) {
+    .controller("ThemesListController", function($scope, Theme, $location, $rootScope, $http) {
 	$scope.themes = Theme.query();
 	$scope.fields = ["id", "name"];
 
 	$scope.show = function(id) {
 	    $location.url("/themes/" + id);
 	};
+	$scope.inSync = false;
+	$scope.sync = function() {
+	    $scope.inSync = true;
+	    $http({
+		url: "/api/sync/themes",
+		method: "GET"
+	    }).then(function(response) {
+		$scope.inSync = false;
+		$scope.themes = Theme.query();
+		if (response.data)
+		    $rootScope.newBox('danger', response.data);
+		else
+		    $rootScope.newBox('success', 'Synchronisation de la liste des thèmes terminée avec succès.');
+	    }, function(response) {
+		$scope.inSync = false;
+		$rootScope.newBox('danger', 'An error occurs when synchronizing theme list:', response.data);
+	    });
+	};
     })
-    .controller("ThemeController", function($scope, Theme, $routeParams, $location) {
+    .controller("ThemeController", function($scope, Theme, $routeParams, $location, $rootScope, $http) {
 	$scope.theme = Theme.get({ themeId: $routeParams.themeId });
 	$scope.fields = ["name", "authors"];
 
@@ -509,15 +527,74 @@ angular.module("FICApp")
 	$scope.deleteTheme = function() {
 	    this.theme.$remove(function() { $location.url("/themes/");});
 	}
+	$scope.inSync = false;
+	$scope.syncExo = function() {
+	    $scope.inSync = true;
+	    $http({
+		url: "/api/sync/themes/" + $scope.theme.id + "/exercices",
+		method: "GET"
+	    }).then(function(response) {
+		$scope.inSync = false;
+		$scope.theme = Theme.get({ themeId: $routeParams.themeId });
+		if (response.data)
+		    $rootScope.newBox('warning', null, response.data, -1);
+		else
+		    $rootScope.newBox('success', 'Synchronisation de la liste des exercices terminée avec succès.');
+	    }, function(response) {
+		$scope.inSync = false;
+		$rootScope.newBox('danger', 'An error occurs when synchrinizing exercices:', response.data);
+	    });
+	};
     })
 
-    .controller("AllExercicesListController", function($scope, Exercice, $routeParams, $location) {
+    .controller("AllExercicesListController", function($scope, Exercice, $routeParams, $location, $rootScope, $http) {
 	$scope.exercices = Exercice.query();
 	$scope.fields = ["title", "statement", "videoURI"];
 
 	$scope.show = function(id) {
 	    $location.url("/exercices/" + id);
 	};
+	$scope.inSync = false;
+	$scope.syncFull = function() {
+	    $scope.inSync = true;
+	    $scope.done = -1;
+	    $scope.total = 0;
+	    var work = [];
+	    var go = function() {
+		if (!work.length) {
+		    $rootScope.newBox('info', "Synchronisation des exercices terminée.");
+		    $scope.inSync = false;
+		    return;
+		}
+		var u = work.pop();
+
+		$http({
+		    url: u,
+		    method: "GET"
+		}).then(function(response) {
+		    $scope.done += 1;
+		    go();
+		}, function(response) {
+		    $scope.done += 1;
+		    go();
+		});
+	    };
+
+	    angular.forEach($scope.exercices, function(ex) {
+		if ($scope.syncFiles)
+		    work.push("/api/sync/exercices/" + ex.id + "/files");
+		if ($scope.syncHints)
+		    work.push("/api/sync/exercices/" + ex.id + "/hints");
+		if ($scope.syncKeys)
+		    work.push("/api/sync/exercices/" + ex.id + "/keys");
+	    });
+	    $scope.total = work.length;
+	    go();
+
+	};
+	$scope.syncFiles = true;
+	$scope.syncHints = true;
+	$scope.syncKeys = true;
     })
     .controller("ExercicesListController", function($scope, ThemedExercice, $routeParams, $location) {
 	$scope.exercices = ThemedExercice.query({ themeId: $routeParams.themeId });
@@ -547,7 +624,7 @@ angular.module("FICApp")
 	}
     })
 
-    .controller("ExerciceFilesController", function($scope, ExerciceFile, $routeParams) {
+    .controller("ExerciceFilesController", function($scope, ExerciceFile, $routeParams, $rootScope, $http) {
 	$scope.files = ExerciceFile.query({ exerciceId: $routeParams.exerciceId });
 
 	$scope.deleteFile = function() {
@@ -559,9 +636,27 @@ angular.module("FICApp")
 	$scope.saveFile = function() {
 	    this.file.$update();
 	}
+	$scope.inSync = false;
+	$scope.syncFiles = function() {
+	    $scope.inSync = true;
+	    $http({
+		url: "/api/sync/exercices/" + $routeParams.exerciceId + "/files",
+		method: "GET"
+	    }).then(function(response) {
+		$scope.inSync = false;
+		$scope.files = ExerciceFile.query({ exerciceId: $routeParams.exerciceId });
+		if (response.data)
+		    $rootScope.newBox('danger', response.data);
+		else
+		    $rootScope.newBox('success', "Synchronisation de la liste de drapeaux terminée avec succès.");
+	    }, function(response) {
+		$scope.inSync = false;
+		$rootScope.newBox('danger', 'An error occurs when synchronizing flags list:', response.data);
+	    });
+	};
     })
 
-    .controller("ExerciceHintsController", function($scope, ExerciceHint, $routeParams) {
+    .controller("ExerciceHintsController", function($scope, ExerciceHint, $routeParams, $rootScope, $http) {
 	$scope.hints = ExerciceHint.query({ exerciceId: $routeParams.exerciceId });
 
 	$scope.addHint = function() {
@@ -579,9 +674,27 @@ angular.module("FICApp")
 		this.hint.$save({ exerciceId: $routeParams.exerciceId });
 	    }
 	}
+	$scope.inSync = false;
+	$scope.syncHints = function() {
+	    $scope.inSync = true;
+	    $http({
+		url: "/api/sync/exercices/" + $routeParams.exerciceId + "/hints",
+		method: "GET"
+	    }).then(function(response) {
+		$scope.inSync = false;
+		$scope.hints = ExerciceHint.query({ exerciceId: $routeParams.exerciceId });
+		if (response.data)
+		    $rootScope.newBox('danger', response.data);
+		else
+		    $rootScope.newBox('success', "Synchronisation de la liste d'indices terminée avec succès.");
+	    }, function(response) {
+		$scope.inSync = false;
+		$rootScope.newBox('danger', 'An error occurs when synchronizing hints list:', response.data);
+	    });
+	};
     })
 
-    .controller("ExerciceKeysController", function($scope, ExerciceKey, $routeParams) {
+    .controller("ExerciceKeysController", function($scope, ExerciceKey, $routeParams, $rootScope, $http) {
 	$scope.keys = ExerciceKey.query({ exerciceId: $routeParams.exerciceId });
 
 	$scope.addKey = function() {
@@ -599,6 +712,24 @@ angular.module("FICApp")
 		this.key.$save({ exerciceId: $routeParams.exerciceId });
 	    }
 	}
+	$scope.inSync = false;
+	$scope.syncKeys = function() {
+	    $scope.inSync = true;
+	    $http({
+		url: "/api/sync/exercices/" + $routeParams.exerciceId + "/keys",
+		method: "GET"
+	    }).then(function(response) {
+		$scope.inSync = false;
+		$scope.keys = ExerciceKey.query({ exerciceId: $routeParams.exerciceId });
+		if (response.data)
+		    $rootScope.newBox('danger', response.data);
+		else
+		    $rootScope.newBox('success', "Synchronisation de la liste de drapeaux terminée avec succès.");
+	    }, function(response) {
+		$scope.inSync = false;
+		$rootScope.newBox('danger', 'An error occurs when synchronizing flags list:', response.data);
+	    });
+	};
     })
 
     .controller("TeamsListController", function($scope, Team, $location) {
diff --git a/admin/static/views/exercice-list.html b/admin/static/views/exercice-list.html
index b8ec8172..2476ad6e 100644
--- a/admin/static/views/exercice-list.html
+++ b/admin/static/views/exercice-list.html
@@ -1,4 +1,15 @@
-<h2>Exercices</h2>
+<h2>Exercices
+  <a ng-click="syncFull()" ng-class="{'disabled': inSync}" class="pull-right btn btn-default"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span> Synchroner</a>
+  <small style="height: 0px;">
+    <div class="checkbox pull-right"><label><input type="checkbox" ng-model="syncFiles"> Fichiers</label></div>
+    <div class="checkbox pull-right"><label><input type="checkbox" ng-model="syncHints"> Indices</label></div>
+    <div class="checkbox pull-right"><label><input type="checkbox" ng-model="syncKeys"> Flags</label></div>
+  </small>
+</h2>
+
+<div class="progress" ng-if="inSync">
+  <div class="progress-bar" style="width: {{ done * 100 / total  }}%;"></div>
+</div>
 
 <div>
   <p><input type="search" class="form-control" placeholder="Search" ng-model="query"></p>
diff --git a/admin/static/views/exercice.html b/admin/static/views/exercice.html
index 155eaf60..9197bbd2 100644
--- a/admin/static/views/exercice.html
+++ b/admin/static/views/exercice.html
@@ -29,7 +29,7 @@
   <div class="col-md-4" ng-controller="ExerciceHintsController">
     <div class="panel panel-default">
       <div class="panel-heading">
-	<h3 class="panel-title">Indices<a ng-click="addHint()" class="pull-right btn btn-xs btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span></a></h3>
+	<h3 class="panel-title">Indices<a ng-click="syncHints()" class="pull-right btn btn-xs btn-default" style="margin-left: 7px"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span></a><a ng-click="addHint()" class="pull-right btn btn-xs btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span></a></h3>
       </div>
       <div class="list-group">
 	<form ng-submit="saveHint()" class="list-group-item form-horizontal" ng-repeat="hint in hints">
@@ -61,7 +61,7 @@
   <div class="col-md-4" ng-controller="ExerciceFilesController">
     <div class="panel panel-default">
       <div class="panel-heading">
-	<h3 class="panel-title">Téléchargements<a ng-click="addFile()" class="pull-right btn btn-xs btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span></a></h3>
+	<h3 class="panel-title">Téléchargements<a ng-click="syncFiles()" class="pull-right btn btn-xs btn-default" style="margin-left: 7px"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span></a><a ng-click="addFile()" class="pull-right btn btn-xs btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span></a></h3>
       </div>
       <div class="list-group">
 	<form ng-submit="saveFile()" class="list-group-item form" ng-repeat="file in files">
@@ -79,7 +79,7 @@
   <div class="col-md-4" ng-controller="ExerciceKeysController">
     <div class="panel panel-default">
       <div class="panel-heading">
-	<h3 class="panel-title">Drapeaux<a ng-click="addKey()" class="pull-right btn btn-xs btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span></a></h3>
+	<h3 class="panel-title">Drapeaux<a ng-click="syncKeys()" class="pull-right btn btn-xs btn-default" style="margin-left: 7px"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span></a><a ng-click="addKey()" class="pull-right btn btn-xs btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span></a></h3>
       </div>
       <div class="list-group">
 	<form ng-submit="saveKey()" class="list-group-item form-horizontal" ng-repeat="key in keys">
diff --git a/admin/static/views/theme-list.html b/admin/static/views/theme-list.html
index 7cef07a6..1a54c0ae 100644
--- a/admin/static/views/theme-list.html
+++ b/admin/static/views/theme-list.html
@@ -1,4 +1,4 @@
-<h2>Thèmes<a ng-click="show('new')" class="pull-right btn btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span> Ajouter un thème</a></h2>
+<h2>Thèmes<a ng-click="sync()" ng-class="{'disabled': inSync}" class="pull-right btn btn-default"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span> Synchroniser</a> <a ng-click="show('new')" class="pull-right btn btn-primary" style="margin-right: 10px;"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span> Ajouter un thème</a></h2>
 
 <p><input type="search" class="form-control" placeholder="Search" ng-model="query"></p>
 <table class="table table-hover table-bordered">
diff --git a/admin/static/views/theme.html b/admin/static/views/theme.html
index 3469a04a..58cf7340 100644
--- a/admin/static/views/theme.html
+++ b/admin/static/views/theme.html
@@ -17,7 +17,7 @@
 </form>
 
 <div ng-show="theme.id" ng-controller="ExercicesListController">
-  <h3>Exercices<a ng-click="show('new')" class="pull-right btn btn-sm btn-primary"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span> Ajouter un exercice</a></h3>
+  <h3>Exercices<a ng-click="syncExo()" ng-class="{'disabled': inSync}" class="pull-right btn btn-sm btn-default"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span> Synchroniser</a> <a ng-click="show('new')" class="pull-right btn btn-sm btn-primary" style="margin-right: 10px;"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span> Ajouter un exercice</a></h3>
 
   <p><input type="search" class="form-control" placeholder="Search" ng-model="query"></p>
   <table class="table table-hover table-bordered">