I agree with you BlueGoat. Most people assume that teaching lessons is a very simple job. I had a guy tell me one time when I was a part time teacher that "Your job is very easy. You just need to move your arm to check papers." He was a boxer. I could've punched him myself. Really, a lot of factors go into lesson prep and high school lessons are theoretically the hardest to prepare of them all. Just writing the detailed lesson plan will take much time. Then you have to think about the approach, the method, the strategies: and these may differ everyday (this sort of thing can't be planned during the summer, believe me, unless you're going to have the same classroom dynamics everyday). You have to keep the flow of the lessons smooth, and even if you've only got five (I had eight) it's all a different battlefield, so to speak. Add to that all the other tidbits - checking papers, communication with parents, preparing daily materials, classroom management, school activities and memos - and you wonder why teachers spend lunch just recharging.