How many of each kind of letter do I need? So far two science professors, 1 D.O. physician, and 1 non-science. If I got one from my professor who taught calculus and pre calculus would that be a science or non-science letter? What if I got one from my hospital volunteer advisor or a nurse who saw me volunteer in the department or my tutor supervisor at center where I tutored? Those count as non-science letters?
The first from the math professor would count as a science, however some schools are picky so carefully read their letter requirements. (Source: I am a Math Major re-app)
As for the others, I would say it would not hurt your application to include all of them, if you are at your 6 letter limit, I would choose the hospital volunteer adviser if you have a strong relationship/nurse if they are someone you report to during your volunteering.