E.G.
My mom is a teacher and her pet peeve is people thinking that it's all about the school and teachers for their children to get a good education. It is, partly, but she said the NUMBER ONE most important thing to have for your kids is parents who read to kids, help with their homework and realize that teaching is NOT 100% the teachers job. The two smartest kids I know went to public schools, but their parents were so incredible active in their schooling, homework, study time, and teaching stuff themselves.
My son is 3, and he'll be going into the local public school, but I've already started an at home learning program to give him a heads start and have every intention of continuing to teach him above and beyond what he gets at school.
Whatever you decide to do, I'm sure your kids will be fine. Just play an active role in their education.