I bolded the biggest key point in your post, the majority of which I agree with wholeheartedly. If there are smart kids at school with each other, public education is fine for them. Even so, they still have diversity. Now, the diversity in my neighborhood is one of whites, a few blacks, a few Mexicans, and a shitload of Asians of all nations. Most of the Asians want absolutely nothing to do with the rest of us stupid riff raff. I feel bad for my 2nd grader because she is only attracted to Asian boys--Chinese, in particular, and their parents are never going to let their sons date a stupid American. In short, my average kids have struggled in their elementary school, stuggled to even be average. My older daughter had two male Asian classmates who scored perfect scores on the math portion of the SAT when they were in 4th grade. Damn... Now, my older daughter is in middle school with a much larger pool of kids from more diverse neighborhoods, even some subsidized housing. Whereas she struggled to make B's and C's in elementary, she's now making all A's and a B. She's still learning a lot, but now she's been thrown into the mix with kids who are less prepared to be good students. It will spiral downward that way until 10th grade. Plano has elementary in K-5, middle in 6-8, high schools in 9-10, and senior highs for 11-12. By the time kids make it to 11th grade, the cream has risen to the top and almost every kid that gets there graduates.