This can’t be overstated. My daughter is 4 grades ahead (and on track to finish HS at 11 or so) and she spends nowhere near a normal amount of time on school. Sure, she’s smart but school is a very inefficient delivery method for learning — and I say that as a university professor.That said, I think far too much emphasis is put on quantity of school time vs. quality. Four hours of classroom time simply does not translate to four hours of learning.