Hi, hon! Long time no talk to!
I agree in pure market principle that a certain amount of internet educational tools can be successfully deployed in local school districts to lighten the taxpayer load of large centralized schools, redundant employees, busing and related costs. What worries me is how unions will distort the market and use CommieCore to force destruction of the private sector in education. If we can't help our neighbors to see how pernicious Federal overreach has become and where it will logically end up (complete tyranny), we are doomed.
I agree, that's definitely a concern. They can exercise a lot of control at the college admission point. Even if state laws or constitutions permit a free choice in private school curriculum, that can be overruled by Federal judges (cf. homosexual "marriage").
On the other hand, with colleges in such desperate competition for students who can either pay tuition or fill a "minority" quote seat, they may resist any limitations on the pool of students from which they can recruit. There are always other directions to go when you start following the money.