Rays and angles and Star Wars? It sounds strange, but it's actually a fun game to help fourth graders get good at measuring and identifying angles and rays with a protractor. Each pair of children chooses which Star Wars character they'd like to be, then they each choose a card from their deck, they measure the angle on the card with a protractor and identify the angle. The child with the largest angle wins both cards. The child with all of the cards at the end of the game wins. Tip: This game could take some time to play, set a timer and state that the child with the most cards when the bell rings wins the game.