She will be taking AP Physics for an year and then maybe pursuing dual enrollment at local state college. Sophomore year might be her hardest year course load wise. After that, she most probably will get used to the level of difficulty of AP classes or college level courses.
Last two years she should be having time for building up her resume, applications and other activities. She is a decent tennis player and likes politics too. That is usually her stress relief along with travel. I will look more into CNA, and check with her if she would be interested in doing anything like that. It might also help to make sure she has the dedication and compassion to make a good doctor.