Dogeball is a traditional game taught in physical education classes in the U.S. and Canada. It is usually played in elementary school, but it is played in middle school, high school, and college and as a professional sport as well. It is also popular in informal settings and is often played by schoolchildren on a playground or in a gym. There are many variations of the game, but each involves players trying to avoid being hit by a ball that players on the other team are throwing at them. A children's game called "dodge ball" has been noted as early as 1892.