I always assume that Romeo & Juliet is still the most popular, but I have nothing to back that up except my own experience which is now pretty old :). I also have no true appreciation of the breadth of plays that some teachers choose.
So, enlighten me. Whether you teach high school, you're in high school, or like me high school is a distant memory, what plays did you read? The more you remember, the better. I'm trying to develop a spectrum from most commonly read all the way down to never read, so it's equally important that we learn which plays *arent* being taught. If you're a teacher, a little extra info on frequency ("I've taught Hamlet every year for 20 years but this is the first year we're doing All's Well That Ends Well") would help as well.
I remember reading: Romeo and Juliet, Hamlet, Macbeth, Julius Caesar, Othello and Taming of the Shrew. I think I can also include Richard II, the Henry plays, and Troilus and Cressida - but truthfully I can't remember whether I read those in high school or early in college. Maybe Midsummer?
Who else? If you're a teacher and know teachers in other schools, please take a moment to forward along this post. The more information, the better!