students have twelve years to reconstruct the world’s profoundest thoughts – discoveries that history’s greatest thinkers took centuries to hit upon. This is not casual play, and it requires directed motivation. It doesn’t matter what flashy interactive graphics exist to teach this material unless a child does the hard internal work to digest it. To persevere, children need guidance and encouragement for all the hours of a school day, at least nine months of the year, sustained over twelve years.