--- course/edit_form.php
+++ course/edit_form.php
@@ -117,6 +117,11 @@ class course_edit_form extends moodleform {
         for ($i=1; $i<=52; $i++) {
           $sectionmenu[$i] = "$i";
         }
+        if (!empty($course) && $course->numsections > 42) {
+            for ($i = $course->numsections -5; $i <= ($course->numsections+10); $i++) {
+                $sectionmenu[$i] = "$i";
+            }
+        }
         $mform->addElement('select', 'numsections', get_string('numberweeks'), $sectionmenu);
         $mform->setDefault('numsections', $courseconfig->numsections);