diff --git a/analytics/classes/local/indicator/community_of_inquiry_activity.php b/analytics/classes/local/indicator/community_of_inquiry_activity.php
index 8a886eb69fe..1e7da1dbd03 100644
--- a/analytics/classes/local/indicator/community_of_inquiry_activity.php
+++ b/analytics/classes/local/indicator/community_of_inquiry_activity.php
@@ -60,6 +60,56 @@ abstract class community_of_inquiry_activity extends linear {
      */
     const INDICATOR_SOCIAL = "social";
 
+    /**
+     * Constant for this cognitive level.
+     */
+    const COGNITIVE_LEVEL_1 = 1;
+
+    /**
+     * Constant for this cognitive level.
+     */
+    const COGNITIVE_LEVEL_2 = 2;
+
+    /**
+     * Constant for this cognitive level.
+     */
+    const COGNITIVE_LEVEL_3 = 3;
+
+    /**
+     * Constant for this cognitive level.
+     */
+    const COGNITIVE_LEVEL_4 = 4;
+
+    /**
+     * Constant for this cognitive level.
+     */
+    const COGNITIVE_LEVEL_5 = 5;
+
+    /**
+     * Constant for this social level.
+     */
+    const SOCIAL_LEVEL_1 = 1;
+
+    /**
+     * Constant for this social level.
+     */
+    const SOCIAL_LEVEL_2 = 2;
+
+    /**
+     * Constant for this social level.
+     */
+    const SOCIAL_LEVEL_3 = 3;
+
+    /**
+     * Constant for this social level.
+     */
+    const SOCIAL_LEVEL_4 = 4;
+
+    /**
+     * Constant for this social level.
+     */
+    const SOCIAL_LEVEL_5 = 5;
+
     /**
      * Max cognitive depth level accepted.
      */
@@ -530,13 +580,15 @@ abstract class community_of_inquiry_activity extends linear {
         foreach ($useractivities as $contextid => $cm) {
 
             $potentiallevel = $this->get_cognitive_depth_level($cm);
-            if (!is_int($potentiallevel) || $potentiallevel > self::MAX_COGNITIVE_LEVEL || $potentiallevel < 1) {
+            if (!is_int($potentiallevel)
+                    || $potentiallevel > self::MAX_COGNITIVE_LEVEL
+                    || $potentiallevel < self::COGNITIVE_LEVEL_1) {
                 throw new \coding_exception('Activities\' potential cognitive depth go from 1 to 5.');
             }
             $scoreperlevel = $scoreperactivity / $potentiallevel;
 
             switch ($potentiallevel) {
-                case 5:
+                case self::COGNITIVE_LEVEL_5:
                     // Cognitive level 5 is to submit after feedback.
                     if ($this->any_feedback('submitted', $cm, $contextid, $user)) {
                         $score += $scoreperlevel * 5;
@@ -544,7 +596,7 @@ abstract class community_of_inquiry_activity extends linear {
                     }
                     // The user didn't reach the activity max cognitive depth, continue with level 2.
 
-                case 4:
+                case self::COGNITIVE_LEVEL_4:
                     // Cognitive level 4 is to comment on feedback.
                     if ($this->any_feedback('replied', $cm, $contextid, $user)) {
                         $score += $scoreperlevel * 4;
@@ -552,7 +604,7 @@ abstract class community_of_inquiry_activity extends linear {
                     }
                     // The user didn't reach the activity max cognitive depth, continue with level 2.
 
-                case 3:
+                case self::COGNITIVE_LEVEL_3:
                     // Cognitive level 3 is to view feedback.
 
                     if ($this->any_feedback('viewed', $cm, $contextid, $user)) {
@@ -562,7 +614,7 @@ abstract class community_of_inquiry_activity extends linear {
                     }
                     // The user didn't reach the activity max cognitive depth, continue with level 2.
 
-                case 2:
+                case self::COGNITIVE_LEVEL_2:
                     // Cognitive depth level 2 is to submit content.
 
                     if ($this->any_write_log($contextid, $user)) {
@@ -571,7 +623,7 @@ abstract class community_of_inquiry_activity extends linear {
                     }
                     // The user didn't reach the activity max cognitive depth, continue with level 1.
 
-                case 1:
+                case self::COGNITIVE_LEVEL_1:
                     // Cognitive depth level 1 is just accessing the activity.
 
                     if ($this->any_log($contextid, $user)) {
@@ -617,16 +669,18 @@ abstract class community_of_inquiry_activity extends linear {
         foreach ($useractivities as $contextid => $cm) {
 
             $potentiallevel = $this->get_social_breadth_level($cm);
-            if (!is_int($potentiallevel) || $potentiallevel > self::MAX_SOCIAL_LEVEL || $potentiallevel < 1) {
+            if (!is_int($potentiallevel)
+                    || $potentiallevel > self::MAX_SOCIAL_LEVEL
+                    || $potentiallevel < self::SOCIAL_LEVEL_1) {
                 throw new \coding_exception('Activities\' potential social breadth go from 1 to ' .
                     community_of_inquiry_activity::MAX_SOCIAL_LEVEL . '.');
             }
             $scoreperlevel = $scoreperactivity / $potentiallevel;
             switch ($potentiallevel) {
-                case 2:
-                case 3:
-                case 4:
-                case 5:
+                case self::SOCIAL_LEVEL_2:
+                case self::SOCIAL_LEVEL_3:
+                case self::SOCIAL_LEVEL_4:
+                case self::SOCIAL_LEVEL_5:
                     // Core activities social breadth only reaches level 2, until core activities social
                     // breadth do not reach level 5 we limit it to what we currently support, which is level 2.
 
@@ -639,7 +693,7 @@ abstract class community_of_inquiry_activity extends linear {
                     }
                     // The user didn't reach the activity max social breadth, continue with level 1.
 
-                case 1:
+                case self::SOCIAL_LEVEL_1:
                     // Social breadth level 1 is just accessing the activity.
                     if ($this->any_log($contextid, $user)) {
                         $score += $scoreperlevel;
diff --git a/mod/assign/classes/analytics/indicator/cognitive_depth.php b/mod/assign/classes/analytics/indicator/cognitive_depth.php
index f75dd47a5a8..08fbf49bd62 100644
--- a/mod/assign/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/assign/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 5;
+        return self::COGNITIVE_LEVEL_5;
     }
 
     /**
diff --git a/mod/assign/classes/analytics/indicator/social_breadth.php b/mod/assign/classes/analytics/indicator/social_breadth.php
index 66f0d48fbf6..fa3790564a8 100644
--- a/mod/assign/classes/analytics/indicator/social_breadth.php
+++ b/mod/assign/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/book/classes/analytics/indicator/cognitive_depth.php b/mod/book/classes/analytics/indicator/cognitive_depth.php
index 0fdf7c99828..ff5dc909c15 100644
--- a/mod/book/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/book/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 1;
+        return self::COGNITIVE_LEVEL_1;
     }
 }
diff --git a/mod/book/classes/analytics/indicator/social_breadth.php b/mod/book/classes/analytics/indicator/social_breadth.php
index e58e6a0eb16..279fa0306f2 100644
--- a/mod/book/classes/analytics/indicator/social_breadth.php
+++ b/mod/book/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/chat/classes/analytics/indicator/cognitive_depth.php b/mod/chat/classes/analytics/indicator/cognitive_depth.php
index 48900528714..dc25e0befc4 100644
--- a/mod/chat/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/chat/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 4;
+        return self::COGNITIVE_LEVEL_4;
     }
 }
diff --git a/mod/chat/classes/analytics/indicator/social_breadth.php b/mod/chat/classes/analytics/indicator/social_breadth.php
index 620e6a8d50d..97b2cf4ba48 100644
--- a/mod/chat/classes/analytics/indicator/social_breadth.php
+++ b/mod/chat/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/choice/classes/analytics/indicator/cognitive_depth.php b/mod/choice/classes/analytics/indicator/cognitive_depth.php
index 6517393cffe..48cec079cfa 100644
--- a/mod/choice/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/choice/classes/analytics/indicator/cognitive_depth.php
@@ -55,9 +55,9 @@ class cognitive_depth extends activity_base {
 
         if ($this->choicedata[$cm->instance]->showresults == 0 || $this->choicedata[$cm->instance]->showresults == 4) {
             // Results are not shown to students or are always shown.
-            return 2;
+            return self::COGNITIVE_LEVEL_2;
         }
 
-        return 3;
+        return self::COGNITIVE_LEVEL_3;
     }
 }
diff --git a/mod/choice/classes/analytics/indicator/social_breadth.php b/mod/choice/classes/analytics/indicator/social_breadth.php
index 8d119ca3b7b..26c0a7dd4bb 100644
--- a/mod/choice/classes/analytics/indicator/social_breadth.php
+++ b/mod/choice/classes/analytics/indicator/social_breadth.php
@@ -52,6 +52,6 @@ class social_breadth extends activity_base {
 
     public function get_social_breadth_level(\cm_info $cm) {
         $this->fill_choice_data($cm);
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/data/classes/analytics/indicator/cognitive_depth.php b/mod/data/classes/analytics/indicator/cognitive_depth.php
index a5278388be6..8ac7fdbe475 100644
--- a/mod/data/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/data/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 2;
+        return self::COGNITIVE_LEVEL_2;
     }
 }
diff --git a/mod/data/classes/analytics/indicator/social_breadth.php b/mod/data/classes/analytics/indicator/social_breadth.php
index 2309c698912..3f3cce2c517 100644
--- a/mod/data/classes/analytics/indicator/social_breadth.php
+++ b/mod/data/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/feedback/classes/analytics/indicator/cognitive_depth.php b/mod/feedback/classes/analytics/indicator/cognitive_depth.php
index cf5403fec06..0890982e329 100644
--- a/mod/feedback/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/feedback/classes/analytics/indicator/cognitive_depth.php
@@ -55,8 +55,8 @@ class cognitive_depth extends activity_base {
 
         if (!empty($this->publishstats[$cm->instance])) {
             // If stats are published we count that the user viewed feedback.
-            return 3;
+            return self::COGNITIVE_LEVEL_3;
         }
-        return 2;
+        return self::COGNITIVE_LEVEL_2;
     }
 }
diff --git a/mod/feedback/classes/analytics/indicator/social_breadth.php b/mod/feedback/classes/analytics/indicator/social_breadth.php
index 64ba6783e8a..d1c7e276f73 100644
--- a/mod/feedback/classes/analytics/indicator/social_breadth.php
+++ b/mod/feedback/classes/analytics/indicator/social_breadth.php
@@ -53,6 +53,6 @@ class social_breadth extends activity_base {
     public function get_social_breadth_level(\cm_info $cm) {
         $this->fill_publishstats($cm);
 
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/folder/classes/analytics/indicator/cognitive_depth.php b/mod/folder/classes/analytics/indicator/cognitive_depth.php
index 39d6207875f..6b1f5582a02 100644
--- a/mod/folder/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/folder/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 1;
+        return self::COGNITIVE_LEVEL_1;
     }
 }
diff --git a/mod/folder/classes/analytics/indicator/social_breadth.php b/mod/folder/classes/analytics/indicator/social_breadth.php
index 55728222704..2d84c0a474e 100644
--- a/mod/folder/classes/analytics/indicator/social_breadth.php
+++ b/mod/folder/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/forum/classes/analytics/indicator/cognitive_depth.php b/mod/forum/classes/analytics/indicator/cognitive_depth.php
index 3641ccf5870..eddfa7e7a81 100644
--- a/mod/forum/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/forum/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 4;
+        return self::COGNITIVE_LEVEL_4;
     }
 
     /**
diff --git a/mod/forum/classes/analytics/indicator/social_breadth.php b/mod/forum/classes/analytics/indicator/social_breadth.php
index e74c2720a0a..d1d1d13b260 100644
--- a/mod/forum/classes/analytics/indicator/social_breadth.php
+++ b/mod/forum/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/glossary/classes/analytics/indicator/cognitive_depth.php b/mod/glossary/classes/analytics/indicator/cognitive_depth.php
index 312f1538ab2..379dd8673f1 100644
--- a/mod/glossary/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/glossary/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 2;
+        return self::COGNITIVE_LEVEL_2;
     }
 }
diff --git a/mod/glossary/classes/analytics/indicator/social_breadth.php b/mod/glossary/classes/analytics/indicator/social_breadth.php
index b47bf0026f9..4c669aa0026 100644
--- a/mod/glossary/classes/analytics/indicator/social_breadth.php
+++ b/mod/glossary/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/imscp/classes/analytics/indicator/cognitive_depth.php b/mod/imscp/classes/analytics/indicator/cognitive_depth.php
index c7388d2e5f4..5c85527b667 100644
--- a/mod/imscp/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/imscp/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 1;
+        return self::COGNITIVE_LEVEL_1;
     }
 
 }
diff --git a/mod/imscp/classes/analytics/indicator/social_breadth.php b/mod/imscp/classes/analytics/indicator/social_breadth.php
index 50ffd0acee9..c93351039c1 100644
--- a/mod/imscp/classes/analytics/indicator/social_breadth.php
+++ b/mod/imscp/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/label/classes/analytics/indicator/cognitive_depth.php b/mod/label/classes/analytics/indicator/cognitive_depth.php
index adacede7199..fc1f3c41b18 100644
--- a/mod/label/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/label/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 1;
+        return self::COGNITIVE_LEVEL_1;
     }
 
 }
diff --git a/mod/label/classes/analytics/indicator/social_breadth.php b/mod/label/classes/analytics/indicator/social_breadth.php
index 86452ec6744..a59263e03af 100644
--- a/mod/label/classes/analytics/indicator/social_breadth.php
+++ b/mod/label/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/lesson/classes/analytics/indicator/cognitive_depth.php b/mod/lesson/classes/analytics/indicator/cognitive_depth.php
index 838f30dc0a6..24ca8e23328 100644
--- a/mod/lesson/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/lesson/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 5;
+        return self::COGNITIVE_LEVEL_5;
     }
 
     /**
diff --git a/mod/lesson/classes/analytics/indicator/social_breadth.php b/mod/lesson/classes/analytics/indicator/social_breadth.php
index cd3c970398b..f0737151be3 100644
--- a/mod/lesson/classes/analytics/indicator/social_breadth.php
+++ b/mod/lesson/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/lti/classes/analytics/indicator/cognitive_depth.php b/mod/lti/classes/analytics/indicator/cognitive_depth.php
index a600f88d049..feb31ffaaec 100644
--- a/mod/lti/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/lti/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 3;
+        return self::COGNITIVE_LEVEL_3;
     }
 
 }
diff --git a/mod/lti/classes/analytics/indicator/social_breadth.php b/mod/lti/classes/analytics/indicator/social_breadth.php
index bd201376b22..896d294698e 100644
--- a/mod/lti/classes/analytics/indicator/social_breadth.php
+++ b/mod/lti/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/page/classes/analytics/indicator/cognitive_depth.php b/mod/page/classes/analytics/indicator/cognitive_depth.php
index 4e3eaca6d6f..0874f77c4c0 100644
--- a/mod/page/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/page/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 1;
+        return self::COGNITIVE_LEVEL_1;
     }
 }
diff --git a/mod/page/classes/analytics/indicator/social_breadth.php b/mod/page/classes/analytics/indicator/social_breadth.php
index 1d27c5c8464..b9542e9cc85 100644
--- a/mod/page/classes/analytics/indicator/social_breadth.php
+++ b/mod/page/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/quiz/classes/analytics/indicator/cognitive_depth.php b/mod/quiz/classes/analytics/indicator/cognitive_depth.php
index 3c7d0a9719b..7e3fbfd667c 100644
--- a/mod/quiz/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/quiz/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 5;
+        return self::COGNITIVE_LEVEL_5;
     }
 
     /**
diff --git a/mod/quiz/classes/analytics/indicator/social_breadth.php b/mod/quiz/classes/analytics/indicator/social_breadth.php
index 4dd2a5c180c..14b45b673b0 100644
--- a/mod/quiz/classes/analytics/indicator/social_breadth.php
+++ b/mod/quiz/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/resource/classes/analytics/indicator/cognitive_depth.php b/mod/resource/classes/analytics/indicator/cognitive_depth.php
index 995b63b7a29..e91986c6d5d 100644
--- a/mod/resource/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/resource/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 1;
+        return self::COGNITIVE_LEVEL_1;
     }
 }
diff --git a/mod/resource/classes/analytics/indicator/social_breadth.php b/mod/resource/classes/analytics/indicator/social_breadth.php
index 4dad871bae7..33fbbcbc6a6 100644
--- a/mod/resource/classes/analytics/indicator/social_breadth.php
+++ b/mod/resource/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/scorm/classes/analytics/indicator/cognitive_depth.php b/mod/scorm/classes/analytics/indicator/cognitive_depth.php
index 4dc11eb7026..42f37e22e1f 100644
--- a/mod/scorm/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/scorm/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 3;
+        return self::COGNITIVE_LEVEL_3;
     }
 }
diff --git a/mod/scorm/classes/analytics/indicator/social_breadth.php b/mod/scorm/classes/analytics/indicator/social_breadth.php
index 1ea6049ab55..a4ba3a6be6c 100644
--- a/mod/scorm/classes/analytics/indicator/social_breadth.php
+++ b/mod/scorm/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }
diff --git a/mod/survey/classes/analytics/indicator/cognitive_depth.php b/mod/survey/classes/analytics/indicator/cognitive_depth.php
index f2958f6eda2..1065cd25fd1 100644
--- a/mod/survey/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/survey/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 2;
+        return self::COGNITIVE_LEVEL_2;
     }
 }
diff --git a/mod/survey/classes/analytics/indicator/social_breadth.php b/mod/survey/classes/analytics/indicator/social_breadth.php
index 958c088b5fd..5673b0e4137 100644
--- a/mod/survey/classes/analytics/indicator/social_breadth.php
+++ b/mod/survey/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/url/classes/analytics/indicator/cognitive_depth.php b/mod/url/classes/analytics/indicator/cognitive_depth.php
index 784510e91d8..8bcfca1650a 100644
--- a/mod/url/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/url/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 1;
+        return self::COGNITIVE_LEVEL_1;
     }
 }
diff --git a/mod/url/classes/analytics/indicator/social_breadth.php b/mod/url/classes/analytics/indicator/social_breadth.php
index 28020b148f9..458a2d88353 100644
--- a/mod/url/classes/analytics/indicator/social_breadth.php
+++ b/mod/url/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/wiki/classes/analytics/indicator/cognitive_depth.php b/mod/wiki/classes/analytics/indicator/cognitive_depth.php
index 973a25d0942..343ebec0480 100644
--- a/mod/wiki/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/wiki/classes/analytics/indicator/cognitive_depth.php
@@ -51,6 +51,6 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 2;
+        return self::COGNITIVE_LEVEL_2;
     }
 }
diff --git a/mod/wiki/classes/analytics/indicator/social_breadth.php b/mod/wiki/classes/analytics/indicator/social_breadth.php
index ec5874c9865..aaf590f4ae4 100644
--- a/mod/wiki/classes/analytics/indicator/social_breadth.php
+++ b/mod/wiki/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 1;
+        return self::SOCIAL_LEVEL_1;
     }
 }
diff --git a/mod/workshop/classes/analytics/indicator/cognitive_depth.php b/mod/workshop/classes/analytics/indicator/cognitive_depth.php
index 85d35d08c43..0f0b437b57a 100644
--- a/mod/workshop/classes/analytics/indicator/cognitive_depth.php
+++ b/mod/workshop/classes/analytics/indicator/cognitive_depth.php
@@ -51,7 +51,7 @@ class cognitive_depth extends activity_base {
     }
 
     public function get_cognitive_depth_level(\cm_info $cm) {
-        return 5;
+        return self::COGNITIVE_LEVEL_5;
     }
 
     /**
diff --git a/mod/workshop/classes/analytics/indicator/social_breadth.php b/mod/workshop/classes/analytics/indicator/social_breadth.php
index 6bc70d760dc..45a3d2d85d8 100644
--- a/mod/workshop/classes/analytics/indicator/social_breadth.php
+++ b/mod/workshop/classes/analytics/indicator/social_breadth.php
@@ -51,6 +51,6 @@ class social_breadth extends activity_base {
     }
 
     public function get_social_breadth_level(\cm_info $cm) {
-        return 2;
+        return self::SOCIAL_LEVEL_2;
     }
 }