If you are a teacher and you're using one of the single-page themes for your class, Clean or More, keep an eye out for this upcoming change. Those two themes are no longer supported by Moodle, and are being retired December 27, when our site is upgraded to Moodle 3. 7. Those themes will automatically be replaced by a new one designed to be very similar to Clean, called Classic. You can read more here, and see an example of the theme in use.