I'm going to sub orientation tomorrow and I'll sign up for the schools I want to sub at while I'm there. I normally put down all of the elementary schools in my town and a couple in the next town over. I subbed one day last year (I taught preschool since no new hires in the district) to keep myself active in the system and it was at middle school. What a HUGE difference between that and elementary. What is subbing at high school like?