I would recommend a mod that allows teens to quit school with no repercussions.
And if you have get together you could create clubs structured around The school.
I’m not doing a magic school, but I built a high school as a library.
I have a Headmaster who assembled his own group of professors. Basically he starts his gathering and the professors show up.
The professors start their gatherings and the students show up. And they learn And just build skills while my sims with powers use magic in the background.
It gives me time to make sure all my teens are bonding and working on skills. And I can play out school how I want to.