Here's a fun subject-integrated exercise that encourages and reinforces knowledge of U.S. Presidents by using their numerical order to exercise basic mathematical skills. It consists of a Handout, A Worksheet and an Answer key. It can be used as an exercise, quiz or test. Once they come up with the answers, you can have students see which President the answer relates to. If the number is higher than 44, invite your students to estimate how far into the future it would take to reach that many Presidents!