Here are five popular unblocked games on Geometry Spot that are often played:

Happy Wheels: A physics-based game where players control a character through various levels using different vehicles. The goal is to reach the end of each level without being injured.
Run 3: A running game where players navigate a character through a series of tunnels and obstacles. The game features multiple characters and levels, each with its own challenges.
Geometry Dash Games: A rhythm-based platformer game where players jump and fly through obstacles to complete levels. The game is known for its challenging gameplay and catchy music.
Tank Trouble: A multiplayer tank game where players control a tank and battle against other players or AI opponents. The goal is to destroy the other tanks while avoiding being destroyed yourself.
Shell Shockers: A multiplayer first-person shooter game where players control egg characters armed with weapons. The goal is to eliminate other players and be the last egg standing.
These games are popular among students due to their engaging gameplay and accessibility on school computers.