I used to teach critical thinking and math to students of all ages at a supplemental learning center for years. My students won awards at national math and critical thinking test competitions every year in increasing quantities. Other than the students who earned medals, all of my students, as a whole, outperformed both national and international averages every year in increasingly larger margins each year. Our learning center was the exact opposite of the Prussian model. We didn't treat our students in a one-size-fits-all way. We neurologically profiled each of our students to inform our efforts to lovingly tailor the curriculum and our interactions to each unique individual in ways best suited for their development and success.