I have always felt that DH and I are the ones who are responsible for our child's education. Even though we send him to public school, I don't see PS as the ones who are, in the end, responsible. I use PS to teach DS things that I cannot or do not want to teach him. But I am always looking for gaps and ways to fill those gaps--music, sports, religion, philosophy, foreign languages, history, geography, science, and free play are a few gaps we've addressed. What I tell my friends (at least the ones who look like they can handle the joke): I do homeschool--I just use public school as PART of the curriculum!