What part time jobs can help me become a doctor?

A teenager looking to become a medical doctor for humans might find working in a Vet's office would expose you to some aspects of science and medicine. Even though small animal medical care differs from human medical care, many of the principles are the same for both. A Vet during slow times might be willing to mentor you and give details about medical care, testing, and medications (they often use human medicines for animals).

You could also apply to work in a nursing home, though they may have age requirements.

Otherwise, jobs that use math will also help because M.D.s constantly must do math figuring (weight, height, dosages).