HOW MANY REFERENCE LETTERS DO I NEED, AND WHO CAN THEY BE FROM?

We do require 3 recommendations, and we are looking to hear from people who know you and your career goals/trajectory, and who can speak specifically to how this program is the next logical step for you. 

While typically for most people this means the recs will come from a former teacher/professor or employer, it also can be from a co-worker or a personal reference.