I love this movie, too, and think you just have to suspend your disbelief a little bit. Obviously Drew doesn't look young enough to be in h.s., and her teacher looks too old to be interested in a h.s. student, but it's Hollywood, right? OTOH, I was teaching senior boys, some of whom were 19, when I was just out of college at age 22, so, realistically, I could have dated one of them (after they graduated, of course!).
Terri