I would do the factory reset again and then not use that account anymore. If you want, you can create a new local-only account and then (this is the important part) sign in to the school Google Classroom on another browser . Install Firefox, Brave, something, and use it for the school account rather than Chrome. Chrome allows extensions installed to it to run in the background and manage the system, but another brows…
A better move would be to get your child out of Chicago public schools altogether.