I’ve tried googling how to have two schools, one elementary and one high school, in my town. I’ve found some NRAAS threads.

The only problem is, when I placed the second school and clicked on its map tag, there was no NRAAS option. I’ve tried replacing both schools and now neither has an option to select NRAAS... has something screwed up?

That's odd, but there does have to be mod in play that provides NRaas commands under a Lot menu in order for NRaas to appear on a lot or its map tag. I notice that you have posted this on the Careers mod board. The Careers mod does not really have anything to do with multiple schools and wouldn't provide any commands there.

Do you have StoryProgression running? MasterController? You might also look to see if there are two tags for each showing up, one for the lot and one for the school.

I have both of those.
What happens when I click on the school... I get the go to school option (greyed out because it’s outside school hours) and, if it’s an adult Sim, the “join the education career” option. There’s no option to take a painting class.
I’m not playing the game right now, but when I do I’ll see if I can get photos of what I mean.
I have no idea if I’ve just completely messed up the game somehow. If the worst comes to the worst I could always move the family to another town, as I’d rather not lose them/the save entirely.