Just imagine getting detention from one these guys or gals.
Many students across the country headed back to school on Tuesday, and if you're like us and start feeling all nostalgic about your own school days at this time of year, we're about to make you feel even older.
Teachers play a huge role in shaping our outlook on school and life, and some fictional teachers also deserve some credit. Sure, they may have only been around for a few hours or a whole series, but their sense of humour, imaginations and willingness to get their kids to graduate make us wish they really existed.
Here are 15 teachers we wanted growing up. Which ones would you add to the list?