Idea for a cover. Make an infographic using data about your school, students. If you do this, look for other info graphics to use as inspiration. Have one of the graphics be a focal point = larger than the others to stand out since it's for your cover.
I like this info poster because the background is beautiful and catches people's attention, but it has a lot of information about this man's adventure as well. It's clear and easy to read , and also very eye catching.