Art sub plans would well be served by remembering these tips.My favorite tip is that you let your sub know ahead of time of possible problems. (Last year I spent an hour with 20 plus kindergarteners by myself, only to experience one of them screaming the entire time. I was out in a trailer by myself and the teacher didn't leave any phone numbers to call in case of problems. Not fun.)
Anyway..... here are some great tips: 9 Ways to Prepare Your Sub for a Tough Class.