You are very welcome!
No educational credentials.
My background is systems design, development, and staff management ... I was running my own business before relocating to Taiwan acting as a CTO (Chief Technology Officer) to startups.
Right now as a favor, I teach my friends daughter some English (now Sundays over Apple's Facetime) and her sister-in-law over here once a week. The 11 year old is a fascinating story. She was incredibly shy (in English or Chinese), but once we started with LINE messaging and then Facetime video, she totally came out of her shell. The impact of an iPad on children is amazing. Maybe the next time I see her in person, I will bring a 10" piece of glass to hold in front of my face!
I could make quite a bit of money teaching English if I wanted to here. I can legally work based on my resident status. I have quite a few friends who are doctors or are connected to doctors which puts me in touch with a client base with money to pay premium rates. (most of those teaching English here are 20 something Americans who are also studying Chinese ... the difference in background, maturity, and knowledge is a stark contrast) Working full time and considering the cost of living difference with the USA, it would be like making about $200,000 USD tax free (a cash business). A las, time is very precious and I am not really eager to forfeit my retirement to start a business. However, many doctors here will rotate to the USA for additional training, and it could be interesting to learn some medicine by virtue of teaching.
At the moment, I am just doing it as a means to bond with friends. Of course, it doesn't hurt (getting older) to have friends who are doctors. About two months ago, I hurt my shoulder and my mobility rapidly fell to only 10%. Proceeding through the normal channels, it could have been 2-3 weeks to get testing, diagnosis, and correct treatment. A few calls from friends and I was on the path to mending in just a couple of days.
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Well, get your son up to speed! Dave could always use some help with the game engine.

2021 - Resigned in writing as a 20+ year Matrix Beta and never looked back ...