Yes yes yes!!! I had these in elementary school in Northern Ontario. The blog doesn't mention it but it also had multiplayer games. I remember a few..

- a horse race game where people raced horses by answering math questions

- a fishing game where your boat went across the top of the water and you had to catch fish and lobster without snagging your line

- a typing game that did not check if you typed the correct words or all the words, and would just calculate "number of words entered / time you took", so if you started a typing test and hit a letter and then escape, it would give you a ridiculous WPM score

It's wild to think that this entire system was only for such a small segment of the population, that we'd have our own computer line. What a weird time, the 1980s