So to demonstrate your sincerity in the discussion, list for us the specific skills you do want your tax dollars to teach in schools.
While I am not OP and probably not even in agreement with OP, I think this is a fantastic question: Reading, writing, arithmetic (of course the basics), unvarnished history, critical thinking, foundations of philosophy, advanced maths* (geometry, trigonometry, light calculus), English, a foreign language, athletics/gymnastics, art, music (with theory), and Civics/Government.
But; most important of all, none of this is based on age groups; rather, ability groups. Nobody should be artificially held back for the convenience of the System.
*advanced for children under 18