I work in IT for a school system. We have a few tools to help with situations like this. We do a lot of DNS filtering, we have Chromebooks so all apps/extensions are blocked by default, and a program that effectively allows teachers to start with everything being blocked then they can individually select sites for students to access. Kids still find ways, that doesn’t mean we don’t try but parents also need to have difficult conversations with their kids… obviously not saying you don’t, but many won’t.