There are many ways to use Cootie Catchers. My favorite is to have a "speed round" where students, in pairs, go as quickly as they can to answer three different questions from a single Cootie Catcher correctly. When the first partner has done so, they switch places and the second partner has to answer three questions correctly from a different Cootie Catcher. The first pair to finish wins.
Below are instructions for folding and using a Cootie Catcher, and some links to the ones I have made to review grammar. If you want to make your own, click here for a free template.