I've told this story before: Back when I was in college, I had a summer internship at a place that was a service center for the K-12 schools in a large county. Microcomputers were the big new thing. We had a facility with one of each kind of computer (Commodore, Apple, Radio Shack, etc.) and all the software we could lay their hands on. Teachers could come in and try things out. My impression was that the "educationa…
My favourite software was The Crystal Rainforest. I think this was for 6-8 year olds. There was a long story (4 floppy discs in 1992!) leading through a rainforest, solving puzzles using increasingly complicated computer programming along the way. Here's a screenshot of rebuilding a rope bridge using a simplified LOGO/turtle graphics: [1]. (There is a playthrough on Youtube, which has skipped all the puzzles. I think someone missed the point...)
I suspect the general market for software has increased so much, that the money to be made on educational software is no longer appealing. It's probably easier to cut out the learning and sell a game, rather than made a few hundred or thousand sales to schools.
[1] https://images-na.ssl-images-amazon.com/images/I/51UoAfDY57L...