[jacquesm]

The bigger problem is that it would make it much harder for poor parents to keep up with the richer ones because they could not afford the service.

[jamestimmins]

This problem has a solution (albeit an imperfect one), which is charging wealthier schools more in order to charge more poor schools less. Obviously that model has drawbacks, but it may work better with a tech product than other areas, where marginal cost is relatively small.

[BadassFractal]

We already have that, it's called Title I: https://en.wikipedia.org/wiki/Elementary_and_Secondary_Educa...