I would buy this if it was done well. As of now, I use the go to school mod by zerbu and it works wonders.
http://zerbu.tumblr.com/post/154260666737/the-sims-4-go-to-school-mod-pack-v4-release
It works like the active work days from get to work, except you play the children or teens in school (once you plop down or create a school building lot type).
It includes teachers principles, counselors, janitors and more (and a non active teacher career). The mod even pulls any sims you put in the teacher career and makes them the active teacher when you go to school as a kid or teen.
It also includes 5 subjects, declaring favorite and least favorite subject, punishment for bad behavior, earning seals which can be traded for stuff, school spirit which affects the sims emotion, and classmates which you can semi-control as you enter school as 1 big group.