Here is what famous author Louise L Hay has to say, and I can only concur with her views:
"How your thoughts work" should be the most essential topic.
This should be followed by subjects such as: How to Handle Finances. How to Invest Money for Financial Security. How to Be a Parent. How to Create Good Relationships. How to Create and Maintain Self-Esteem and Self-Worth.
Memorizing battle dates et cetera would be out. What's the point in wasting time learning such things. The whole education system would be designed to putting out happy, well adjusted young adults.