Class is in session! The subject? Hilarious school signs that will make you laugh every time. Check out this collection of funny signs that are posted by schools... and the occasional liquor store getting in on the back-to-school bandwagon. Some of the funny school signs you'll see are a total fail, and whoever posted them definitely needs to brush up on their education. Some signs are definitely pranks made by students, while others are genuine placement mistakes.This list of hilarious school signs will definitely make you feel glad that you're not in school anymore! Vote up the best funny school signs below, and be sure to let us know what you think in the comment section.