I agree with what you're saying but it's just not realistic for some families to homeschool children.

I do have a modest proposal though:

End the government monopoly on K-12 and force schools to compete for students by funding students. Freedom can be messy, but competition will quickly winnow the successful from the losers.

This one simple change, which could be implemented right now, will unleash the wisdom of millions as the power of free people freely interacting with other free people transforms public education. Every student will gain, as will almost every teacher. Teachers want to be paid what they are worth? This is guaranteed to accomplish that.

Based on the success of competition everywhere else, it's likely to work. It can be done quickly. And it doesn’t cost an extra dime on a net basis.