Each Flipper contains hundreds of rules, examples, and definitions. Simply pick a topic and "flip" the laminated card to reveal the information needed. Teachers use Flippers as a classroom resource and parents use Flippers to help their children at home. Most important, students actually use Flippers for homework and exam preparation. The 31/2" x 5" laminated cards are attached to a 61/2" x 11" plastic backing. Three holes permit carrying the Flippers in a three-ring notebook.