Most of these sites operate on the same principle (hosting games on Google Sites or similar mirrors to bypass school firewalls).
Ready to build? Follow this 20-minute blueprint. classroom 50x games better
The clock ticked to 2:25. The bell was five minutes away. Sites Similar to (or "Better" than) Classroom 50x
Kahoot!: The gold standard for competitive, whole-class review quizzes. Mystery Bag Demonstration