diff --git a/mod/kalvidassign/db/install.xml b/mod/kalvidassign/db/install.xml
index 38705673..403030d8 100755
--- a/mod/kalvidassign/db/install.xml
+++ b/mod/kalvidassign/db/install.xml
@@ -18,7 +18,8 @@
         <FIELD NAME="emailteachers" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" COMMENT="Email submissions to the teacher" PREVIOUS="resubmit" NEXT="grade"/>
         <FIELD NAME="grade" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" COMMENT="Maximum grade the assignment is worth" PREVIOUS="emailteachers" NEXT="timecreated"/>
         <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" COMMENT="Time the assignment was created" PREVIOUS="emailteachers" NEXT="timemodified"/>
-        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" COMMENT="The time the assignment settings were modified" PREVIOUS="timecreated"/>
+        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" COMMENT="The time the assignment settings were modified" NEXT="hidegrader"/>
+        <FIELD NAME="hidegrader" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" COMMENT="Prevent late submissions" PREVIOUS="timemodified"/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
diff --git a/mod/kalvidassign/db/upgrade.php b/mod/kalvidassign/db/upgrade.php
index 2d47d9c7..bee9a42d 100644
--- a/mod/kalvidassign/db/upgrade.php
+++ b/mod/kalvidassign/db/upgrade.php
@@ -71,8 +71,8 @@ function xmldb_kalvidassign_upgrade($oldversion) {
     }
 
     if ($oldversion < 2014023000.01) {
-
-        // Define field metadata to be added to kalvidassign_submission.
+        //
+        //        // Define field metadata to be added to kalvidassign_submission.
         $table = new xmldb_table('kalvidassign_submission');
         $field = new xmldb_field('metadata', XMLDB_TYPE_TEXT, null, null, null, null, null, 'timemarked');
 
@@ -85,5 +85,18 @@ function xmldb_kalvidassign_upgrade($oldversion) {
         upgrade_mod_savepoint(true, 2014023000.01, 'kalvidassign');
     }
 
+    if ($oldversion < 2022041905) {
+        $table = new xmldb_table('kalvidassign');
+        $field = new xmldb_field('hidegrader', XMLDB_TYPE_INTEGER, 1, true, true, null, 0, 'timemodified');
+
+        // Conditionally launch add field metadata.
+        if (!$dbman->field_exists($table, $field)) {
+            $dbman->add_field($table, $field);
+        }
+    }
+
+    // Kalvidassign savepoint reached.
+    upgrade_mod_savepoint(true, 2014023000.01, 'kalvidassign');
+
     return true;
 }
\ No newline at end of file
diff --git a/mod/kalvidassign/lang/en/kalvidassign.php b/mod/kalvidassign/lang/en/kalvidassign.php
index 521f5b85..1b04e933 100644
--- a/mod/kalvidassign/lang/en/kalvidassign.php
+++ b/mod/kalvidassign/lang/en/kalvidassign.php
@@ -79,6 +79,8 @@
 $string['savedchanges'] = 'Changed Saved';
 $string['save'] = 'Save Changes';
 $string['cancel'] = 'Close';
+$string['hidegrader'] = 'Hide grader identity from students';
+$string['hidegrader_help'] = 'If enabled, the identity of any user who grades an assignment submission is not shown, so students can\'t see who marked their work.';
 $string['checkconversionstatus'] = 'Check video conversion status';
 $string['pluginname'] = 'Kaltura Media Assignment';
 $string['video_converting'] = 'The video is still converting.  Please check the status of the video at a later time.';
diff --git a/mod/kalvidassign/mod_form.php b/mod/kalvidassign/mod_form.php
index d5125382..9ab77b94 100644
--- a/mod/kalvidassign/mod_form.php
+++ b/mod/kalvidassign/mod_form.php
@@ -71,6 +71,10 @@ public function definition() {
 
         $this->standard_grading_coursemodule_elements();
 
+        $name = get_string('hidegrader', 'kalvidassign');
+        $mform->addElement('selectyesno', 'hidegrader', $name);
+        $mform->addHelpButton('hidegrader', 'hidegrader', 'kalvidassign');
+
         $this->standard_coursemodule_elements();
 
         $this->add_action_buttons();
diff --git a/mod/kalvidassign/renderer.php b/mod/kalvidassign/renderer.php
index 2e4f95d8..a182df6a 100644
--- a/mod/kalvidassign/renderer.php
+++ b/mod/kalvidassign/renderer.php
@@ -1096,9 +1096,14 @@ public function display_grade_feedback($kalvidassign, $context) {
         $gradedate = $grade->dategraded;
         $gradeby   = $grade->usermodified;
 
+
         // We need the teacher info
-        if (!$teacher = $DB->get_record('user', array('id'=>$gradeby))) {
-            print_error('cannotfindteacher');
+        $teacher = null;
+        if (!$kalvidassign->hidegrader)
+        {
+            if (!$teacher = $DB->get_record('user', array('id'=>$gradeby))) {
+                print_error('cannotfindteacher');
+            }
         }
 
         // Print the feedback