This is an old edutainment game that I used to play at school. We used Mac OS 9 there. This game taught you all about various subjects (possibly focusing on math?), all taking place in a zoo or similar.
The one game I can remember the most was one involving a train and the "Number Line". You would solve questions based on adding/subtracting large numbers to move along the Number Line to get to your destination.
Anything helps at this point! I'd love to play this game again.