On 4/20 last year (11th grade) I had English right after lunch, which was a really good class, and one that would be really funny to be baked for. Moreover, about 1/3 of my English class tokes on a regular basis. With this in mind, we baked a whole tray of high-potency brownies, and about 11 people of the 30 in the class ate one at the beginning of lunch.

By the time class started, we were all pretty buzzed, and really high by the end of it. It was the only time I've been high in school, but it was well worth it-- just imagine, tripping out on 4/20 with a third of your class!