Bookcase Shadows- This has LOTS of possibilities. What about having the kids MAKE an outline of something from their favorite book and use it to bring your classroom bookcases come to life & to use as their shelf marker (so they know where to put their books back)
Rewarding kids with things they get to do instead of things they get to have. When they do something good, they pick from the jar and get things like to stay up a little later or play outside a little longer
Spelling battleship 2 player game, each player inserts his word list in spaces going across (one letter per box). Players take turns guessing coordinates. If they miss, they mark it on their board. If they hit a letter, they keep guessing until they miss. If they sink a word, the player marks it off of his list. The goal of the game is to sink all of your opponent's words.