On the other hand, I think I just figured out the lesson I want to do on the last two days of school. It's something that allows me to break down my lab before class so I don't have to do everything in two hours.
(Due to snow days, the last day for students is the last day for teachers. We have 2 hour early dismissals to give us time to clean our rooms. Hard to do that in 2 hours when you have to break down a computer lab.)