Can somebody give me tips for subbing at a high school? How does it differ from elementary school? How can I gain their respect and keep control of the classroom? I am educated as an elementary school teacher, and sub in upper elementary classes frequently. I'm happy and confident teaching these younger kids, but don't have experience teaching high school students. I need more days of work, so am broadening my horizons. I've accepted a high school placement for tomorrow. Thanks for any advice!