The answer isn’t some fancy security software or screening, it is much simpler: no software, period. The bulk of school should be learning in a classroom, computers are not required.
They can and should be allowed in limited doses early on, and can build over time, particularly as courses either obviously require it or the computers truly facilitate the learning.
We had her public school teachers trying to tell us the answer to our daughter’s reading issues was more screen time. We ended up sending her to a private religious school with very limited screen time, and she is now an A and B student.
This is a huge problem in public schools because state and federal governments are complicit in burying kids (and parents!) in unnecessary technology. During Covid, the feds flooded schools with literal billions of dollars that did not go to better teachers, it went to smart boards and MacBook pros and iPads and dozens of “School as a Service” providers who existed only to extract money from clueless superintendents who have a seemingly endless supply of tax money to draw from.