diff --git a/competency_iena_competencies_api.php b/competency_iena_competencies_api.php
index f877df944324f6198339523dbff7ffa403f85830..58d6146ccfdb685fb220a2eb8aed0212c4c6ccee 100644
--- a/competency_iena_competencies_api.php
+++ b/competency_iena_competencies_api.php
@@ -16,6 +16,8 @@
 	require_once('entity/block_competency_iena_cron_roles.php');
 	require_once('entity/block_competency_iena_cron_competency.php');
 	require_once('entity/block_competency_iena_referentiel.php');
+	require_once('entity/block_competency_iena_matrix.php');
+	
 	require_once('view/view_competency_iena_competencies.php');
 	
 	
@@ -30,9 +32,11 @@
 	
 	$course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
 	require_login($course, false, NULL);
-	
+	error_log("post");
+	error_log(var_dump($_POST));
 
 	if ($_POST) {
+		error_log("flag");
 		//Donne les infos sur la comp
 		if (isset($_POST["idcompetence"])) {
 			$idcompetence = htmlspecialchars($_POST["idcompetence"]);
@@ -71,10 +75,7 @@
 			
 		}
 		if (isset($_POST["addactivities"])) {
-		
 			$value = $_POST["addactivities"];
-			//return var_dump($value);
-			
 			$resultInsert="";
 			$errorInsert=false;
 			$moduleI = new block_competency_iena_module();
@@ -91,7 +92,22 @@
 				echo "true";
 			}
 			else{
-				echo get_string('error_insert', 'block_competency_iena').$resultInsert;
+				echo get_string('error_delete', 'block_competency_iena').$resultInsert;
+			}
+		}
+		if (isset($_POST["delactivities"])) {
+		
+			$value = $_POST["delactivities"];
+			$resultDelete="";
+			$errorDelete=false;
+			$matrix_instance=new block_competency_iena_matrix();
+			$request=$matrix_instance->delete_competencies_link_matrix($value[0]);
+			if($request){
+				$matrix_instance->delete_activity_matrix($value[0]);
+				echo "true";
+			}
+			else{
+				echo "false";
 			}
 		}
 //		updateTextRef
@@ -163,4 +179,7 @@
 			}
 		}
 	}
+	else{
+		error_log("PAS POST ???");
+	}
 	
\ No newline at end of file
diff --git a/competency_iena_competencies_mgmt.php b/competency_iena_competencies_mgmt.php
index 137f9782dd710aa8bf9cd36bacc4bc2b081a4d3c..97915d43ded2b914e9052096f8450c53276b8c82 100644
--- a/competency_iena_competencies_mgmt.php
+++ b/competency_iena_competencies_mgmt.php
@@ -25,7 +25,7 @@
 		$editmode=false;
 	}
 	if ($_POST) {
-
+		error_log($_POST);
 		if ($_POST['info'][0] == "delete_cpt") {
 			//$module_id = htmlspecialchars($_POST['info'][1]);
 			$module_id=$courseid;
@@ -161,17 +161,8 @@
 		$competency->link = $CFG->wwwroot . "/blocks/competency_iena/competency_iena_user.php?courseid=" . $courseid . "&competencyid=" . $competency->id;
 	}
 
-	
-	
-	//$matrix_modules=new block_competency_iena_module();
-
-
 
 	$module_instance = new block_competency_iena_module();
-	//$modules = $module_instance->get_modules_by_courseID($courseid);
-
-	//$section_instance = new block_competency_iena_section();
-	//$sections = $section_instance->get_sections_by_id_course($courseid);
 
 	$infos = get_fast_modinfo($COURSE->id);
 	$sections=$infos->get_section_info_all();
@@ -179,6 +170,7 @@
 	$index=0;
 	$sections_matrix=array();
 	$sections_modal=array();
+	
 	//Pour chaque section on va regarder s'il y a des modules, et si oui on formate et on ajoute les modules à la section
 	foreach ($sections as $section) {
 
diff --git a/entity/block_competency_iena_competency.php b/entity/block_competency_iena_competency.php
index 8a5333f18636fe8a2629fbf20d791ae20367310f..a3dbb778cbaa8477f2b47a6a3e5b7118b680fa39 100644
--- a/entity/block_competency_iena_competency.php
+++ b/entity/block_competency_iena_competency.php
@@ -231,7 +231,11 @@ list_evidence_in_course
 	}
 
 
-		//  retourne la liste des compétences pour un module
+	/**
+	 * Récupère les compétences par le module ID
+	 * @param type $id_module 
+	 * @return type
+	 */
 	public function get_competencies_by_moduleID($id_module)
 	{
 		global $DB;
@@ -296,4 +300,6 @@ list_evidence_in_course
 	    return $data;
 	}
 
+	
+
 }
diff --git a/entity/block_competency_iena_matrix.php b/entity/block_competency_iena_matrix.php
new file mode 100644
index 0000000000000000000000000000000000000000..f14306a1d59e209b5597ba9f21b681b2e41899a5
--- /dev/null
+++ b/entity/block_competency_iena_matrix.php
@@ -0,0 +1,50 @@
+<?php
+/**
+ * The iena filter plugin transforms the moodle resource links
+ * into a button that opens the resource in a modal
+ * 
+ * @package    block_competency_iena
+ * @category   block
+ * @copyright  2021 Université de Lorraine
+ * @author     Myriam Delaruelle
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+/**
+ * block_competency_iena_matrix
+ *
+ *
+ * @package    competency_iena
+ * @copyright  Université lorraine
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class block_competency_iena_matrix {
+    
+    public $activities;
+    public $competencies;
+    
+    public function delete_competencies_link_matrix($module_id){
+        global $DB;
+        $status=0;
+        try{
+            $status=$DB->delete_records('competency_modulecomp',  ['cmid' => $module_id]);
+
+        }
+        catch(dml_exception $e) {
+
+        }
+        return $status;
+    }
+
+    public function delete_activity_matrix($module_id){
+        global $DB;
+        $request=0;
+        try{
+            $request = $DB->delete_records('block_competency_iena', ['cmid' => $module_id]);
+        }
+        catch(dml_exception $e){
+
+        }
+        return $request;
+    }
+}
diff --git a/js/matrix.js b/js/matrix.js
index 98b7694e06ecfdb59775534b187a4092c696dbff..0ba01acf8833a8a4f8695ff7e8d4762373381c90 100644
--- a/js/matrix.js
+++ b/js/matrix.js
@@ -19,7 +19,6 @@ jQuery(document).ready(function($){
 
 
 	$('#filter-iena-competence').keyup(function(){
-		console.log("hello filter");
 		var searchText = $(this).val();
 		$('ul > li').each(function(){
 			var reg = new RegExp(searchText, 'gi');
@@ -35,6 +34,7 @@ jQuery(document).ready(function($){
 	});
 
 
+
 	function treed(o, treeid){
 		var openedClass = 'glyphicon-minus-sign';
 		var closedClass = 'glyphicon-plus-sign';
@@ -109,24 +109,9 @@ function filter() {
 
 
 function showFilter(obj, pencil){
-	/*var p = obj.parentNode.parentNode;
-	var c = p.children;
-
-	if (c[2].dataset.edit == 'editOn') {
-
-		obj.parentNode.parentNode.children[2].setAttribute("style", "display:inline");
-		c[0].setAttribute("style", "display:inline");
-		c[1].setAttribute("style", "display:none");
-		c[2].dataset.edit = 'editOff';
-	} else {
-		obj.parentNode.setAttribute("style", "display:none");
-		c[0].setAttribute("style", "display:none");
-		c[1].setAttribute("style", "display:inline");
-		c[2].dataset.edit = 'editOn';
-	}*/
-
-	console.log(pencil);
+	
 	if(pencil==true){
+
 		$("#"+obj).find(".iena-select").hide();
 		$("#"+obj).find(".iena-matrix-icons").show();
 		$("#"+obj).find(".module-outcome").show();
@@ -208,10 +193,6 @@ function addActivities(url, idcourse){
 function supprimer_lien(obj) {
 	var res = window.confirm('Etes-vous sûr de vouloir supprimer le lien entre cette activité et cette compétence ?');
 	if (res) {
-
-		console.log(obj);
-
-
 		var string=obj.split('-');
 		var module_id=string[0].substring(8);
 		var competency_id=string[1].substring(10);
@@ -273,36 +254,41 @@ function supprimer_lien_cpt(cpt_id) {
 		});
 	}
 }
-function select_value(){
 
+function supprimer_lien_activite(activity_id, url) {
+	var res = window.confirm('Etes-vous sûr de vouloir supprimer cette activité de ce cours ?');
+	if (res) {
+		var value = [];
+		value[0]=activity_id;
+		$.ajax({
+			url: url,
+			type: 'POST',
+			timeout: 10000,
+			contentType: 'application/x-www-form-urlencoded',
+			data: {delactivities:value},
+			success: function(result) {
+				if (result.trim() == "true"){
+					location.reload();
+				} else {
+					alert(result);
+				}
+			}
+		});
+	}
+
+	
 }
 
+
 //Edite le lien entre compétence et activité dans la matrice
 function select_update(obj){
-	console.log(obj);
-	/*var t = obj.parentNode;
-	var p = t.parentNode;   
-	var c = p.children;
-
-	c[0].setAttribute("style", "display:inline");
-	c[1].setAttribute("style", "display:none");
-	c[2].setAttribute("style", "display:inline");
-
-	c[2].dataset.edit = 'editOff';*/
-
 	var select=$("#"+obj);
 	var choix_ruleoutcome=select.val();
-
-
 	var string=obj.split('-');
 	var module_id=string[0].substring(9);
 	var competency_id=string[1].substring(10);
-
 	var cell=$("#tdmodule"+module_id+"-competency"+competency_id);
-	console.log(cell);
 	var div_form=cell.find(".iena-select");
-	console.log(div_form);
-
 	cell.find(".iena-select").hide();
 	cell.find(".iena-matrix-icons").show();
 
@@ -324,17 +310,10 @@ function select_update(obj){
 			if (status == "success"){
 				var renderer = data.split("/")[1];
 				var switchColor = data.split("/")[0];
-				/*if (!(switchColor.trim() == "update")){
-					changeColor(p);
-				}*/
-				//var div_id = c[0].id;
-				//document.getElementById(div_id).firstChild.nextSibling.textContent = renderer;
 				$("#divmodule"+module_id+"-competency"+competency_id+" p").html(renderer);
 				$("#divmodule"+module_id+"-competency"+competency_id).show();
-
-				//cell.find(".iena-matrix-icons > .fa-times").data("edit", "editOff");
 				cell.find(".iena-matrix-icons > .fa-trash").show();
-				//cell.find(".module-outcome").show();
+			
 			}
 
 		},
@@ -363,7 +342,6 @@ function changeColor(obj)
 function selectCompetency(obj){
 	 $('#btn-comp-iena').removeAttr('disabled');
 	box = $(obj);
-	console.log(box);
 	if(box.is(':checked')){
 		children=$(obj).parent().find('.iena-checkbox-cpt');
 		if(children.length>0){
@@ -392,13 +370,10 @@ function selectCompetency(obj){
 
 //Sélectionne/déselectionne une activité et ses enfants
 function selectActivity(obj){
-	console.log("on select une activité");
-	console.log($('#btn-activities-iena'));
+	
 	$('#btn-activities-iena').removeAttr('disabled');
 	box = $(obj);
-	console.log(box);
 	if(box.is(':checked')){
-		console.log("ici chekc");
 		children=$(obj).parent().find('.iena-checkbox-activities');
 		if(children.length>0){
 			for(var i=0; i<children.length; i++){
@@ -408,7 +383,6 @@ function selectActivity(obj){
 		}
 	}
 	else if(!box.is(':checked')){
-		console.log("ici pas check");
 		children=$(obj).parent().find('.iena-checkbox-activities');
 		if(children.length>0){
 			for(var i=0; i<children.length; i++){
@@ -418,7 +392,6 @@ function selectActivity(obj){
 		}
 	}
 	var count=countSelectedObjects('activities');
-	console.log(count);
 	if(count==0){
 		$('#btn-activities-iena').prop('disabled', true);
 	}
diff --git a/lang/en/block_competency_iena.php b/lang/en/block_competency_iena.php
index 8add205e53ae6b8ea4f0a54b7c4550eb3112f5b6..0dec00c9df190afa508c8f35dcc50066fdbe557a 100644
--- a/lang/en/block_competency_iena.php
+++ b/lang/en/block_competency_iena.php
@@ -86,4 +86,5 @@
     $string['manage_matrix'] = 'Edit matrix';
     $string['manage_matrix_end'] = 'Exit edit mode';
     $string['no_competency_description'] = 'This competency doesn\'t have a description' ;
+    $string['error_delete']="The activity/resource couldn't be deleted";
 ?>
\ No newline at end of file
diff --git a/lang/fr/block_competency_iena.php b/lang/fr/block_competency_iena.php
index d492fe060d9b50e8b95c799785d7d3c58eeaac5b..f3cad313aff947af984c83fceb7dfee3b0bd0dde 100644
--- a/lang/fr/block_competency_iena.php
+++ b/lang/fr/block_competency_iena.php
@@ -85,6 +85,7 @@
     $string['manage_matrix'] = 'Modifier la matrice';
     $string['manage_matrix_end'] = 'Quitter le mode édition';
     $string['no_competency_description'] = 'Cette compétence n\'a pas de description.';
+    $string['error_delete']="L'activité/ressource n'a pas pu être supprimée";
 
 
 
diff --git a/templates/matrix_competencies.mustache b/templates/matrix_competencies.mustache
index 252cb4f5cc48297c3d80b8dadb63a5ffac89f777..11e3dfb32deb140dcce0ca57b09aac51e8f1db1a 100644
--- a/templates/matrix_competencies.mustache
+++ b/templates/matrix_competencies.mustache
@@ -30,7 +30,10 @@
 			</tr>
 			{{#matrix_modules}}
 			<tr>
-				<td><a href="{{link}}">{{name}}</a></td>
+				<td>
+					<a href="{{link}}">{{name}}</a> 
+					{{#edit}}<i class="icon fa fa-trash fa-fw " style="color:#dc493a" onclick='supprimer_lien_activite({{moduleid}},"{{update_link}}")'></i>{{/edit}}
+				</td>
 				{{#mcompetencies}}
 					<td class="text-success" align=right id="tdmodule{{moduleid}}-competency{{id}}">
 						{{#module_ruleoutcomestring}}