That won't help a thing. Your kids will use the school provided device - you won't be able to take it away because they really do have homework they need to do on it. Of course what they will really be doing the moment you turn your back is playing one of the not-approved non-homework things that the school hasn't blocked yet - the school will figure it out in a week, but by then there will be 2 more and each one is going to spread fast between kids in school.
I'm a parent, the above is my reality.