diff --git a/mod/quiz/classes/structure.php b/mod/quiz/classes/structure.php
index ac6405bc729..ad2bb5e3c25 100644
--- a/mod/quiz/classes/structure.php
+++ b/mod/quiz/classes/structure.php
@@ -181,6 +181,19 @@ class structure {
         return $this->canbeedited;
     }
 
+    /**
+     * This quiz can only be edited if they have not been attempted.
+     * Throw an exception if this is not the case.
+     */
+    public function check_can_be_edited() {
+        if (!$this->can_be_edited()) {
+            $reportlink = quiz_attempt_summary_link_to_reports($this->get_quiz(),
+                    $this->quizobj->get_cm(), $this->quizobj->get_context());
+            throw new \moodle_exception('cannoteditafterattempts', 'quiz',
+                    new \moodle_url('/mod/quiz/edit.php', array('cmid' => $this->get_cmid())), $reportlink);
+        }
+    }
+
     /**
      * How many questions are allowed per page in the quiz.
      * This setting controls how frequently extra page-breaks should be inserted
@@ -472,6 +485,8 @@ class structure {
     public function move_slot($idmove, $idbefore, $page) {
         global $DB;
 
+        $this->check_can_be_edited();
+
         $movingslot = $this->slots[$idmove];
         if (empty($movingslot)) {
             throw new moodle_exception('Bad slot ID ' . $idmove);
@@ -575,6 +590,8 @@ class structure {
      */
     public function refresh_page_numbers_and_update_db($quiz) {
         global $DB;
+        $this->check_can_be_edited();
+
         $slots = $this->refresh_page_numbers($quiz);
 
         // Record new page order.
@@ -594,6 +611,8 @@ class structure {
     public function remove_slot($quiz, $slotnumber) {
         global $DB;
 
+        $this->check_can_be_edited();
+
         $slot = $DB->get_record('quiz_slots', array('quizid' => $quiz->id, 'slot' => $slotnumber));
         $maxslot = $DB->get_field_sql('SELECT MAX(slot) FROM {quiz_slots} WHERE quizid = ?', array($quiz->id));
         if (!$slot) {
@@ -663,6 +682,8 @@ class structure {
     public function update_page_break($quiz, $slotid, $type) {
         global $DB;
 
+        $this->check_can_be_edited();
+
         $quizslots = $DB->get_records('quiz_slots', array('quizid' => $quiz->id), 'slot');
         $repaginate = new \mod_quiz\repaginate($quiz->id, $quizslots);
         $repaginate->repaginate_slots($quizslots[$slotid]->slot, $type);
diff --git a/mod/quiz/edit.php b/mod/quiz/edit.php
index 6f9af09c720..0b906509a31 100644
--- a/mod/quiz/edit.php
+++ b/mod/quiz/edit.php
@@ -98,6 +98,7 @@ if ($scrollpos) {
 
 if (optional_param('repaginate', false, PARAM_BOOL) && confirm_sesskey()) {
     // Re-paginate the quiz.
+    $structure->check_can_be_edited();
     $questionsperpage = optional_param('questionsperpage', $quiz->questionsperpage, PARAM_INT);
     quiz_repaginate_questions($quiz->id, $questionsperpage );
     quiz_delete_previews($quiz);
@@ -106,6 +107,7 @@ if (optional_param('repaginate', false, PARAM_BOOL) && confirm_sesskey()) {
 
 if (($addquestion = optional_param('addquestion', 0, PARAM_INT)) && confirm_sesskey()) {
     // Add a single question to the current quiz.
+    $structure->check_can_be_edited();
     quiz_require_question_use($addquestion);
     $addonpage = optional_param('addonpage', 0, PARAM_INT);
     quiz_add_quiz_question($addquestion, $quiz, $addonpage);
@@ -116,6 +118,7 @@ if (($addquestion = optional_param('addquestion', 0, PARAM_INT)) && confirm_sess
 }
 
 if (optional_param('add', false, PARAM_BOOL) && confirm_sesskey()) {
+    $structure->check_can_be_edited();
     $addonpage = optional_param('addonpage', 0, PARAM_INT);
     // Add selected questions to the current quiz.
     $rawdata = (array) data_submitted();
@@ -133,6 +136,7 @@ if (optional_param('add', false, PARAM_BOOL) && confirm_sesskey()) {
 
 if ((optional_param('addrandom', false, PARAM_BOOL)) && confirm_sesskey()) {
     // Add random questions to the quiz.
+    $structure->check_can_be_edited();
     $recurse = optional_param('recurse', 0, PARAM_BOOL);
     $addonpage = optional_param('addonpage', 0, PARAM_INT);
     $categoryid = required_param('categoryid', PARAM_INT);
@@ -145,6 +149,7 @@ if ((optional_param('addrandom', false, PARAM_BOOL)) && confirm_sesskey()) {
 }
 
 if (optional_param('savechanges', false, PARAM_BOOL) && confirm_sesskey()) {
+    $structure->check_can_be_edited();
     $deletepreviews = false;
     $recomputesummarks = false;
 
diff --git a/mod/quiz/edit_rest.php b/mod/quiz/edit_rest.php
index 9bfd95813a4..7396ba739ae 100644
--- a/mod/quiz/edit_rest.php
+++ b/mod/quiz/edit_rest.php
@@ -53,6 +53,7 @@ $quiz = $DB->get_record('quiz', array('id' => $quizid), '*', MUST_EXIST);
 $cm = get_coursemodule_from_instance('quiz', $quiz->id, $quiz->course);
 $course = $DB->get_record('course', array('id' => $quiz->course), '*', MUST_EXIST);
 require_login($course, false, $cm);
+
 $quizobj = new quiz($quiz, $cm, $course);
 $structure = $quizobj->get_structure();
 $modcontext = context_module::instance($cm->id);
diff --git a/mod/quiz/repaginate.php b/mod/quiz/repaginate.php
index ee46e735182..9b430144498 100644
--- a/mod/quiz/repaginate.php
+++ b/mod/quiz/repaginate.php
@@ -34,6 +34,12 @@ require_sesskey();
 $quizobj = quiz::create($quizid);
 require_login($quizobj->get_course(), false, $quizobj->get_cm());
 require_capability('mod/quiz:manage', $quizobj->get_context());
+if (quiz_has_attempts($quizid)) {
+    $reportlink = quiz_attempt_summary_link_to_reports($quizobj->get_quiz(),
+                    $quizobj->get_cm(), $quizobj->get_context());
+    throw new \moodle_exception('cannoteditafterattempts', 'quiz',
+            new moodle_url('/mod/quiz/edit.php', array('cmid' => $cmid)), $reportlink);
+}
 
 $slotnumber++;
 $repage = new \mod_quiz\repaginate($quizid);