"I am Keng from Thailand. If you need to study math, I'm here."
...It would be nice if you can let me know about the contents that you want to learn for few days in advance. So I can prepare materials for our lesson. Playing tennis is good for health. I have played tennis for 30 years. If you're learning to play tennis, you need to know how to hold a racket, hit a ground stroke (Forehand and Backhand), hit a volley,...
10+ subjects, including Microsoft Excel