There is nothing free about public schools when they are run by unionized public workers. They are socialist training camps.
All public schools should be turned over to private education companies (a whole new industry). This would eliminate about 50-60% of state & local taxes, and give parents and students complete freedom to choose how education dollars are spent.
But naturally a leftist, collectivist, socialist, or Democrat will say in response that parents can't be trusted with making decisions about where to send the kids to school, for how long, what to learn, or how much to pay. The same anti-capitalists are in favor of price controls, wage controls, production controls, thought control, gun control, abortion on demand, same-sex marriages, and taking my private property in order to give it to someone else.