diff --git a/resources/library/interactivities/Cadran.wgt/i18n/Messages.properties b/resources/library/interactivities/Cadran.wgt/i18n/Messages.properties
index a6d4c263..c74e540a 100644
--- a/resources/library/interactivities/Cadran.wgt/i18n/Messages.properties
+++ b/resources/library/interactivities/Cadran.wgt/i18n/Messages.properties
@@ -1,4 +1,4 @@
-fr.njin.i18n.document.title = Cadran opératoire
+fr.njin.i18n.document.title = Dial
 
 fr.njin.i18n.toolbar.edit = Edit
 fr.njin.i18n.toolbar.view = Display
diff --git a/resources/library/interactivities/Cadran.wgt/js/help-template.js b/resources/library/interactivities/Cadran.wgt/js/help-template.js
index e7d800e0..fa87cca6 100644
--- a/resources/library/interactivities/Cadran.wgt/js/help-template.js
+++ b/resources/library/interactivities/Cadran.wgt/js/help-template.js
@@ -1 +1,13 @@
-<h3>Le disque</h3>
\ No newline at end of file
+<h3>Dial</h3>
+<h4>Mental calculation</h4>
+
+<p> With this interactivity you can work a particular number (number of the days) with additions, subtractions, multiplications and divisions. The goal is to train mental calculation clicking on the dial and on the question mark. </p>
+
+<p> "Reload" button resets the selection. </p>
+<p> Enter the "Edit" mode to : </p>
+<ul> <li> choose the theme of the App : tablet, slate, or none (by default : slate), </li>
+<li> modify the number in the center of the dial. </li> </ul>
+
+<p> To change the number in the center, click and replace it.</p>
+
+<p>"Display" button comes back to the activity.</p>
\ No newline at end of file
diff --git a/resources/library/interactivities/Calcul.wgt/i18n/Messages.properties b/resources/library/interactivities/Calcul.wgt/i18n/Messages.properties
index dee454c8..8daf48b6 100644
--- a/resources/library/interactivities/Calcul.wgt/i18n/Messages.properties
+++ b/resources/library/interactivities/Calcul.wgt/i18n/Messages.properties
@@ -10,7 +10,7 @@ fr.njin.i18n.parameters.label.slate.themes = slate
 fr.njin.i18n.parameters.label.pad.themes = pad
 fr.njin.i18n.parameters.label.none.themes = none
 
-fr.njin.i18n.calcul.parameters.label.operator = Opérateur
-fr.njin.i18n.calcul.parameters.label.range = Ordre de grandeur
-fr.njin.i18n.calcul.parameters.label.count = Nombre d'éléments de l'opération
-fr.njin.i18n.calcul.parameters.label.operations = Nombre d'opérations
\ No newline at end of file
+fr.njin.i18n.calcul.parameters.label.operator = Operation
+fr.njin.i18n.calcul.parameters.label.range = Magnitude
+fr.njin.i18n.calcul.parameters.label.count = Number of elements
+fr.njin.i18n.calcul.parameters.label.operations = Number of operations
\ No newline at end of file
diff --git a/resources/library/interactivities/Calcul.wgt/js/help-template.js b/resources/library/interactivities/Calcul.wgt/js/help-template.js
index b179daa3..a9ee95e6 100644
--- a/resources/library/interactivities/Calcul.wgt/js/help-template.js
+++ b/resources/library/interactivities/Calcul.wgt/js/help-template.js
@@ -1 +1,17 @@
-<h3>Calcul rapide</h3>
\ No newline at end of file
+<h3> Calculation </h3>
+<h4> Arithmetic, simple operations </h4>
+ 
+<p>Interactivity trains add, subtract and multiply numbers. The goal is to enter the correct results. To check the answer click on the "v" button. If the result is incorrect, the calculation turns in red. If the result is correct, the calculation turns in green. </p>
+<p>Once the series is performed, the interactivity reviews all calculations</p>
+ 
+<p>"Reload" button generates new calculations. </p>
+ 
+<p>Enter the "Edit" mode to choose the : </p>
+<ul> <li>the theme of the App : tablet, slate, or none (by default : slate), </li>
+<li> operation (addition, subtraction, multiplication),</li>
+<li> magnitude of proposed numbers,</li>
+<li> number of elements (2-4),</li>
+<li> number of operations (1-5). </li> </ul>
+
+<p> Results are automatically calculated by the interactivity. </p>
+<p>"Display" button comes back to the activity.</p>