Educational games made up a pretty large part of my childhood, and not just JumpStart either. So, just for fun I'd like to share some of them, and if anyone else wants to share some of their favorites I'd be interested in hearing about them!
So, here's some educational games I remember playing in my childhood:
The Blaster Learning Series - Another Knowledge Adventure title! I only played a few of the math/reading games, and I really enjoyed all of those. I really liked the various creative intergalatic settings the games took place in.
The ClueFinders - These games were great for keeping me invested in educational gaming well into my 3rd-6th grade school years. They usually involved a lot of fantasy and mystery elements that really sucked you into the story. I still have a major fondness for the ClueFinders 3rd Grade especially. It was my first ClueFinders game and I still think it has some of the most interesting visuals and characters of the whole series.
Trivia Munchers Deluxe - I remember playing this at my local library before I got my own copy. The wacky charcter designs are quite a bit of fun, and even though the game play is pretty simple it has a kind of charm to it.
Museum Madness - Here's an oldie, it had a pretty neat concept as you play as a kid who has to navigate a museum where the various exhibits come to life. I remember this game really delved into science and history, I'd say it was pretty handy at teaching useful concepts, especially for the higher elementary school grades.
Pajama Sam 3 - Never played any of the other Pajama Sam games, strangely enough, but this one was pretty fun with its charming art style and fun characters. It had a really bizarre premise, but it made good use of it to teach about food and nutrition (which is also an educational topic you don't really see in a lot of games.) It's certainly one-of-a-kind.