A few notes:
(1) Do NOT use acronyms (unless the word limit is an issue).
(2) List is not in any specific order.
(3) There are several reasons that the Common App has a restriction on the number of activities you may include. For one, you should report only ones that are significant to you. Even though you claim to be greatly involved in each activity, many admissions officers (mainly those at top universities) will see your EC list and think, “Oh, another one of these kids with a bunch of clubs and what-not.”
Activities list (currently at 9):
-Junior Boosters (Executive Board, a group of specifically appointed students)
-Student Council (Treasurer Junior and probably senior year)
-EMERGE sophomore leadership program (Junior Facilitator)
-NAACP (President 2 years)
-School Volleyball AND Club Volleyball under the same activity tab (you do not appear to be involved enough in club volleyball to warrant a separation)
-Started a HOSA chapter
-Team ASAP / Peer Tutor
-Model UN (seems similar to NAACP)
-Started and developed curriculum for a mentorship program… (possibly group with peer tutoring)
Academic awards list:
-Freshman, Sophomore, and National Honor Societies
To write about in an essay showing your dedication to the medical field:
-Science/Medicine summer program at Emory University
-Biomedical research at the NIH this summer
-Hospital Volunteer