At high-school there was a broad variety of microcomputers, namely an Apple II for the chemistry lab (I didn't really like chemistry enough in order to sign in for advanced voluntary classes, so I never had the chance to access it), a Radio Shack TRS-80, and several Commodore CBMs. We used the CBM (an upgraded Commodore PET model) in computer science classes, where we learned about some more advanced topics, and solved problems like waiting queue simulations, or simple text-based, keyboard-controlled racing games.