Games
Open a game so your class can join, and close it when you're done.
Sign in with your teacher Google account to control the games.
Reset does more than close a game. Oddly Even also clears the coins
and zeroes both team scores; Pythagorean Rush removes every connected player;
Prime Sprint clears the race room and every racer.
Prime Sprint: Open the room, let students join, then press
Start race — every race uses the time limit and number range set here,
and pressing Start again runs a rematch on a fresh course.
Closing this page signs you out and shuts every game — that is what stops
students joining outside class.