the thing not being taught in school isn't any basic fact, but critical thinking skills. I firmly believe from all my time as a tutor that there is a window in

the thing not being taught in school isn't any basic fact, but critical thinking skills. I firmly believe from all my time as a tutor that there is a window in childhood during which children need certain stimulation to pick up these skills, and much like language if this window is missed it becomes much harder to train them later in life.