I think local social networks are the path forward here. Things similar to mastodon - albeit with some specific additions - because they are already local orien

I think local social networks are the path forward here. Things similar to mastodon - albeit with some specific additions - because they are already local oriented, just prevent children from having any "federated" interactions (e.g. outside the local instance). In addition ways for parents to observe the follow/messaging behavior of their children, and how their messages are federated (e.g. keeping the data private to the local instance unless otherwise approved). This also works well because it means only the local community will be on the app, and children can only interact with locals. And they could theoretically still be allowed to retweet or discuss federated content in a sort of read-only manner; and the content they are allowed to reach could be on a white list decided upon by the intersection of the community via the school (e.g. a conservative list of content the school will choose for educational resources) and parents (e.g. a more liberal list parents will vet for their children).