Longer school years aren't the answer. The problem is school itself. Compulsory teach-and-test simply doesn't work By Peter Gray
examined how children learn in cultures that don’t have schools,
especially hunter-gatherer cultures, the kinds of cultures in which our
species evolved. I’ve also studied learning in our culture by children
who are trusted to take charge of their own education and are provided
with the opportunity and means to educate themselves. In these settings,
children’s natural curiosity and zest for learning persist all the way
through childhood and adolescence, and into adulthood."