I would teach bass fishing or fishing in general. I love being outdoors and helping people catch fish, it is a blast to watch a little kid catch there first fish on a lure that they casted and reeled and set the hook.
I would teach objectivity. Too often people hold beliefs, or jump to conclusions and never ever open their minds up to challenge their own assumptions. A little dose of objectivity is a wonderful cure for bigotry, fanaticism, and hatred.
It depends I have been trying to teach people through my business a number of things for years. Probably 1 percent are only interested half the rest seem to throw it in your face when they get it wrong after not listening. Hmmm maybe I just need to find some new people.
In short YES as video teaching or pages and the like No not in person
I would teach cosmetology or life lessons and holding oneself accountable for things that happen in your life. Life is about choices ergo the choices you make in your life are the direct result of consequences and stress in your life