One thing I'd like to do in my classroom is have a "Fact of the Day" Board. I think it could be a fun, easy way to teach kids some fun facts that you may not cover otherwise. I also plan to use it to post some fun "extra" facts about things we are learning about - things that may not be on the quiz, but might engage kids in a lesson.
I made this one up. It's 11x14. I've printed it on photo paper and laminated it so that I can write on it with dry-erase markers (to make changing it simple). We'll see how it goes!