(1) Thank you Catalystik, as you suggested, I made a separate category named it as "Physician Shadowing."
The third year resident ER shadowing one was about 15 hours
Shadowing ENT, Thoracic, and general surgeons and Anesthesiologist in OR by observing surgery was also 15 hours.
I went to mission trip to Ecuador for 10 days and shadowed Internist and Pediatricians for about 25 hours. But they were speaking Spanish to patients and tried to explain to me in English on what they were saying and doing. Should I list them as well?
(2) I practiced Japanese Fencing during my first and second year and was the vice president of the club during my second year. I taught basics to beginning students and helped the president and the head instructor in arranging tournaments and seminars(bringing highly experienced instructors from NYC). Should I put it as Leadership or Hobby?
(3) I attend Korean Catholic Church and am currently volunteering as a "weekend school teacher." Other teachers and I teach abridged bible stories to elementary school kids, and since these kids just recently moved to USA with their Ph.D student parents, I teach them in English to improve their pronunciation and reading. But I do this only once every other week and only assist another teacher during other weeks. I also pay special attention to one child, who is diagnosed with Autism. Since he is easily distracted and always says random stuff, I try to help him to keep up with other kids. Is this too trivial to list as nonmedical volunteering?
(4) I play tennis every week with other Korean students and often compete in our tournament. Should I count this as a hobby? Or is it too trivial?
(5) I was the member of pre-health club for 2 years and did random volunteering with them for about 2 hours per week. Volunteering at farm, teenage single mother tutoring, Ronald McDonald house, homeless kitchen, nursing home(still nonmedical since I was just playing games), and etc. But I never held a leadership position since all they do is just checking to make sure that people did volunteering. Should I list this as a nonmedical volunteering? Or is it trivial?