Mine had a bunch of iMac g3s, eMacs came toward grade 8.

Games weren't explicitly forbidden, just needed to finish work first, new Cross Country Canada, math circus and Oregon trail were the games I recall the most of. There was this one game though I can't recall the name of but the concept was interesting, you played as a time travelling velociraptor and had to save dinosaur eggs from extinction, was like a 3rd person shooter, I have no idea why that was on school computers

Edit: was Nanosaur

In the distant year of 4122, a dinosaur species, Nanosaurs, rule the Earth. Their civilization originated from a group of human scientists who experimented with genetic engineering. Their experimentation led them to resurrect the extinct dinosaur species; however, their victory was short-lived, as a disastrous plague brought the end of their civilization itself. The few dinosaurs resurrected were lent an unusual amount of intelligence from their human creators, leaving them to expand on their growing civilization. However, as the Nanosaurs were the only species on Earth, inbreeding was the only possible choice of reproduction. This method largely affected the intelligence of the various offspring, and slowly began to pose a threat to their once-intelligent society.

The Nanosaur government offers a quest that involves time traveling into the year 65 million BC, where the five eggs of ancient dinosaur species must be retrieved and placed in a time portal leading to the present year. Their high-ranking agent, a brown Deinonychus Nanosaur, is chosen to participate in this mission. On the day of her mission, she is teleported to the past via a time machine in a Nanosaur laboratory.