Problem of the Week Bulliten Board

I feel that part of managaing materials is managing your bulliten boards. I was in a junior high class, and my cooperating teacher would put up a problem of the week on a bulliten board. If students wished they could do the problem and earn some extra credit. I think this is a great idea not only for junior high, but it would be fabulous to use in the upper elementary grades to extend learning. Since I was in junior high math she would put up math problems from the book "Crossing the River with Dogs", but I think if this idea was used in the upper elementary grades you could put up anything you want to help reinforce your "main idea" for the week. Stephanie Smith