Why not use it to teach math? Engage your students with this game-based classroom response system played by the whole class in real time. Multiple-choice questions are projected on the screen, then students answer with their smartphone, tablet, or computer. Grades K–12 Games and activities for studentsInteractive websites that provide students with instruction and independent practice. Two users play a game in which each player tries to connect four game pieces in a row (like game Connect Four). The players answer math questions to connect the pieces. Teacher chooses how much time each player has to answer, the level of difficulty, and the type of math problem.