I tested this out today and think it has a lot of potential for community engagement. The block is installed in the usual way blocks are installed; when you then turn on the editing, add a block in a course and click the configuration icon you are presented with  options to decide how you want your block to display: size of image, speed and -usefully - who is allowed to upload - just teachers or everyone.: The block appears on the course page with a "plus" like icon to add images to: While...