Flash, now!
Flash, now!
I’m certain that Coolmath and the sites.google.com blocked games are unavailable.
I remember a game called Treasure of Cutlass Reef. It was a pirate-themed ship action game.
Search them online? It’s quite simple. Be mindful of what you do, and remember there might be consequences if you’re caught.
It's not due to any mathematical elements involved. I don't know what filters your school uses, but it functioned well there.