Which Curriculum Does Peter Gray Suggest for Learning?

Dr. Peter Gray discussing the principles that should govern the process of learning and deciding what should go into curriculum, activities and attention. Hint: Not what you might think. Excerpt from: https://www.youtube.com/watch?v=coMXLy8RBIc&pp=ygUacGV0ZXIgZ3JheSBzY2hvb2xzIHRod2FydGU%3D