I just opened a new business, teaching home owners the basic maintenance and how to accomplish improvements of their homes. I just taught a customer how to tile a floor, another on cutting and installing new trim in his house. Next week I'll be sitting in a lawn chair instructing a home owner and his "crew" on how to build a deck. Teaching can be fun and profitable.
I would teach how to ascend to the next step of evolution.
Probably programming and robotics. Kids around here love it. Long-term investing and personal finance would also be fun to teach. Too many seem to fail in that area.
I would teach mathematics and computer science.
I would teach compassion. There's so little of it anymore....
I will teach math, reading, writing, spelling
I have been a part-time Professor at many Universities and Colleges in years past to teach Ethics and Morals amongst some other classes in Criminology and at many Police Training Schools as well as defensive driving and Martial Arts. So I have been there, done that and loved it
Probably English or history.