Aside from my memories of public school, mostly traumatic, I subbed K-12 for a couple of years for a view from the otherside. American public education compares well enough with other countries up to about the fourth grade, after which it is a race to the bottom. The student subculture becomes increasingly resistant to and contemptuous of learning, which is just so not cool. We were paid more to sub middle school; we called it "combat pay." So seriously consider sparing your children middle school. For some who survive with curiosity intact in spite of middle school, high school can be a learning experience, but for too many it is a wasteland.
Our son went to public school K-4, skipping first grade. We often read to him and I recall when he was in kindergarten he announced he could read. I flipped a few chapters ahead in the book I was reading to him and said, "Read this." He read without the slightest hesitation or fumbling, "Compsognathus was a small dinosaur that lived in the late Cretaceous." So I believed him. His fourth grade teacher was good, but I had seen things to come so we secular homeschooled him and were not in league with other homeschoolers in the area who were all religiously motivated. The so called 'gifted programs', all the ones in our area, were a bad joke.
I suppose I wanted him to be like me, an autodidactic, which I didn't learn to be in school. He learned to learn and before high school he tested into college level in most subjects. After monitoring classes in one of the top rated high schools in the country that offered a lot of AP classes, he was put off that it took most teachers 10 minutes to get the students to pretend to focus. At thirteen he started college. He did go to a local high school one semester with two foreign exchange students we had taken in "for anthropological research" before going back to college. With an AS in CS he decided not to go to university as he could learn more and faster on his own and thought it would slow him down. He had wanted to get his GED, but was too young at the time, so near the end of college he got it. He is now, early 20's, working IT and doing well thank you. If I recall, I learned about /. from him, so educators all.