diff --git a/local/qeupgradehelper/lib.php b/local/qeupgradehelper/lib.php
index 35b9e87ac81ed..74413754da7e3 100644
--- a/local/qeupgradehelper/lib.php
+++ b/local/qeupgradehelper/lib.php
@@ -25,9 +25,6 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-require_once (dirname(__FILE__) . '/locallib.php');
-
-
 /**
  * Standard cron function
  */
@@ -51,11 +48,16 @@ function local_qeupgradehelper_cron() {
  * This function does the cron process within the time range according to settings.
  */
 function local_qeupgradehelper_process($settings) {
+    global $CFG;
+    require_once(dirname(__FILE__) . '/locallib.php');
+
     if (!local_qeupgradehelper_is_upgraded()) {
         mtrace('qeupgradehelper: site not yet upgraded. Doing nothing.');
         return;
     }
 
+    require_once(dirname(__FILE__) . '/afterupgradelib.php');
+
     $hour = (int) date('H');
     if ($hour < $settings->starthour || $hour >= $settings->stophour) {
         mtrace('qeupgradehelper: not between starthour and stophour, so doing nothing (hour = ' .
@@ -64,11 +66,27 @@ function local_qeupgradehelper_process($settings) {
     }
 
     $stoptime = time() + $settings->procesingtime;
+
+    mtrace('qeupgradehelper: processing ...');
     while (time() < $stoptime) {
-        mtrace('qeupgradehelper: processing ...');
 
-        // TODO
-        mtrace('qeupgradehelper: sorry, not implemented yet.');
-        return;
+        $quiz = local_qeupgradehelper_get_quiz_for_upgrade();
+        if (!$quiz) {
+            mtrace('qeupgradehelper: No more quizzes to process. You should probably disable the qeupgradehelper cron settings now.');
+            break; // No more to do;
+        }
+
+        $quizid = $quiz->id;
+        $quizsummary = local_qeupgradehelper_get_quiz($quizid);
+        if ($quizsummary) {
+            mtrace('  starting upgrade of attempts at quiz ' . $quizid);
+            $upgrader = new local_qeupgradehelper_attempt_upgrader(
+                    $quizsummary->id, $quizsummary->numtoconvert);
+            $upgrader->convert_all_quiz_attempts();
+            mtrace('  upgrade of quiz ' . $quizid . ' complete.');
+        }
     }
+
+    mtrace('qeupgradehelper: Done.');
+    return;
 }
diff --git a/local/qeupgradehelper/locallib.php b/local/qeupgradehelper/locallib.php
index e27388d7b19fe..dabae5426eeb8 100644
--- a/local/qeupgradehelper/locallib.php
+++ b/local/qeupgradehelper/locallib.php
@@ -659,3 +659,15 @@ function local_qeupgradehelper_load_question($questionid, $quizid) {
 
     return $question;
 }
+
+function local_qeupgradehelper_get_quiz_for_upgrade() {
+    global $DB;
+
+    return $DB->get_record_sql("SELECT quiz.id
+            FROM {quiz_attempts} quiza
+            JOIN {quiz} quiz ON quiz.id = quiza.quiz
+            JOIN {course} c ON c.id = quiz.course
+            WHERE quiza.preview = 0 AND quiza.needsupgradetonewqe = 1
+            GROUP BY quiz.id, quiz.name, c.shortname, c.id
+            ORDER BY quiza.timemodified DESC", array(), IGNORE_MULTIPLE);
+}