I remember this math game! I think it was just called MATH GAME or something, no?
Involving adding, subtracting and....butterflies. There was even this other math game where I think you were a knight, and I believe it had a world view map, where you went to specific places, then the platforming started (I think).
And there was Ecosaurus!
Of course, all that was at home. When I was a kid, we didn't mess around with silly "educational" games in school. We had Jetpack. And Dangerous Dave. And before that, we used to compete at who could type out A to Z the fastest. And we'd send little messages to each other using SEND "somethingsomething".