Teaching kids to be iterate does not take hours a day as the failed public education system makes it, wasting huge amounts of the kids time in mindless, irrelevant pursuits and teaching methods.
The modern education system is only though to be the norm amongst educrats. Throughout history, kids learned to read at home from their parents, even when they only did their studying for a few hours a day in the winter.
Any biography of those who learned at home can attest to that.