Do your students need more practice figuring out how much shorter, how much longer, or what is the total length? Use this deck of boom cards to practice, including 8 different cards. Instant feedback for students, and for teachers if linked with google classroom. Download and follow directions to access your Boom Cards. To use Boom Cards, you must be connected to the Internet. Boom Cards play on modern browsers (Chrome, Safari, Firefox, and Edge). Apps are available for Android, iPads, iPhones,