6 hour shifts fit into 24 hours just as well as 8 hour shifts do. You just need one more. And how long is elementary school? 8AM-3PM? If teachers weren't often

6 hour shifts fit into 24 hours just as well as 8 hour shifts do. You just need one more. And how long is elementary school? 8AM-3PM? If teachers weren't often required to do work outside of class, those hours sound pretty reasonable.