how many letters of rec needed?

My advisor always touted having 4 letters,2 sci and 2 non-sci. I am applying this year and have found certian schools have odd requests (requirements). Jefferson wants a letter from a chemistry, physics and biology profs. NYMC wants rec. from your major dept. But mostly amy four letters have served me well. I double majored in Biology and Art so I have recs from profs. in both dept whom I worked with and know me well. I also have one from an anthopology prof. who I took alot of classes from. The key is to get your requests to the prof. early, perferably when they still remember you.
Letters from Volunteering are optional at some schools, it can never hurt to collect as many good recs. as you can.

 

Many people send between 4 and 6 letters. Science professors definitely (at least 2, and 3 if you're applying to Jefferson), and make sure to have a humanities one as many schools ask for that. I've not seen a school that asks for English.

 

You also asked this question in the everyone section. I answered it there. Here is the link.
http://www.studentdoctor.net/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic&f=3&t=004576