From the developers of the fun vocabulary app, The World’s Worst Pet comes a new math app called Door 24. Door 24 is a free iPad app in which students practice mathematics skills while working toward the goal of helping the game’s characters Bella and Beau fix Victor the robot’s fried circuits and solve the secret of Door 24. The main premise of the game is that students have to use number facts, order of operation, and number relationships to create expressions equivalent to 24.
Door 24 has six levels of increasing difficulty. The game is designed for elementary school and middle school students.