How should a high school student go about picking a good pre-medical undergraduate school?
Talk to the medical school advisors at the medical school you want to attend. They should have a list of good schools for you.
You will need either a Bachelor's of Science in either Biology or Chemistry. My biggest recommendation is to look at the medical school you want to got to and see what additional requirements they have to be accepted. It's often a good idea to look at a doing your premed at the school you plan to get your MD at. Good luck!