I do participate in math and science clubs and involve in math Olympiads, so I can put a check mark on that. As a Chinese, I think joining the Chinese club can be pretty helpful(in terms of influencing those ethnic Chinese who have marginal understanding of Chinese language and culture at best), so I probably should do so. Volunteering is really hard to find in my area, particularly those of a STEM focus, but I will try.
By the way, does universities outside Texas accept credits that I get in TAMS (normally)?