I am developing this game tangl.in - it’s yet another multiplayer snake game, but this time with several game modes.
So far I have Capture the Flag, Math Solving, Laser Tag and Classic modes. And you can play in teams! Just add [team name] in front of your name and play together with friends agains everyone else (team name will be hidden).
Laser tag - still trying to figure out proper effect lasers should have, it currently doesn’t kill you, but shifts your head and makes you loose energy/food.
Capture the flag - you compete for flag as a team.
Sometimes teachers would let their students play games while in class. I think team math battles can be entertaining and give participants moral excuse