[TOMT][EDUCATIONAL GAME] Children's educational game series from late 90's

Now, they may be from as late as the very early 2000's or much older, all I know is I played them as a very young child around ~2004.

It was a series of disc games for PC, one for each grade of education.

The cover of the disc would have a large number, possibly white with a red background. So they would say 1st for 1st grade, 2nd for 2nd, etc. all the way up to 5th.

I believe the games featured a rabbit, but I do not believe it was Reader Rabbit as I couldnt find a cover that looked like what I remember.

I've been struggling with remembering this for years now, so any help would be appreciated.

The games themselves I do not remember well, and would easily mix them up. They were not 3D, simple point and click style games.