Mostly what I did through classes in High School was draw in my notebooks. I've got pages and pages of drawings done in class, when most other kids were taking notes. I listened with one ear and drew away. I don't remember ever getting in trouble for it or anything like that. As long as I was doing OK in the class, all was cool. Bear in mind, I wasn't drawing during math class. I had to pay attention there, not that it did me much good!
Posted here are various drawings c.1981-1983. Aside from the werewolf head profile (which is from 1985), these are sketches based on photo stills. Besides the two E.T.'s, there's a Gamorrean Guard from Return of the Jedi, a Lon Chaney Wolfman (c.1981), and the twisted cartoon monster creatures (originaly created by Rob Bottin) from the Joe Dante directed episode of The Twilight Zone movie.