Eliminate public school as it exists today and allow parents to take their kids to any school they want. Take the funds diverted to public schools and divert them to an education voucher for parents instead, they will vote with their wallets.

Rethink the basic curriculum so that our kids are actually learning useful things and can tangibly apply their learned skills. For mathematics, this means eliminating bullshit like imaginary numbers and advanced geometry, and adding a greater emphasis to statistics, basic algebra, and data comprehension. For history, this means learning about history's broad strokes before deep-diving into any specific subject. Your state and country history should also be emphasized before anything else. For science, the scientific method should be the only thing that is absolutely taught.

With the base curriculum simplified so that students learn core fundamental skills, students should be given the opportunity to study subjects of their choice in greater detail via electives. choosing a class makes it more likely for the student to be engaged with the class's material and therefore have motivation to learn.

Finally, hold students more to adult standards when it comes to crime. if there's a fight, charge the students involved with assault as appropriate. if there is a theft, charge thief as appropriate. if someone is relentlessly bullied or gained up on, put restraining orders on the table. if a student is caught abusing the system, put them up for fraud. Deck the Halls with passively monitored security cameras, regularly use footage when settling disputes. Schools, especially public schools, have devolved into prison rules which is not a good environment for a developing mind.