I would go further and not only teaching probability and statistics, but also teach basic calculus with simple polynomials, programming, Monti Carlo simulations

I would go further and not only teaching probability and statistics, but also teach basic calculus with simple polynomials, programming, Monti Carlo simulations, sines and cosines, computer simulations, all starting around age 13. Advance algebra, geometry, and full trigonometry are not required for any of that. Why make students wait until senior year or college to experience the fun stuff?