Did homeschooling just fall off the face of the planet? Stop sending your kids to these kinds of schools. Take the initiative to be learned enough to teach your kids at least the fundamentals, and then instill in them the drive to want to learn more. It's made much easier with the advent of the internet.

And someone's probably going to respond "but muh socialization!" In what other real-life scenario are you going to end up with a bunch of people who are almost identical in age, with little to no responsibilities, regurgitating shit with no incentive other than that you have to be there, or else? You don't. After that, it's off to either real school (university) where people are all at various stages of their education throughout their life, chasing education in fields that actually benefit them and the rest of society; or they work a job where there's even more diversity and generally less interaction with people.

Lower school is an alien place to be, and always has been.