Nonacademic Letter of Recommendation for Masters I've been working as a TA for an on campus program for the last year and a half. The director really likes me; she has a Masters in Mathematics and runs the learning services program for the STEM programs but she doesn't teach or do research.

I'm planning on applying to Master's in Computer Science programs and want to eventually do work in mass education programs (like Khan Academy or Coursera). Would it be acceptable to ask for a letter of recommendation from her? 

I figured it would be "different" in a good way; also, any other letters would be "average" at best. I was a good student but not much more in my classes.
it depends on the university, for instance on my university the hierarchy of letter of recommendations goes like this:


Top priority: Faculty (same/different institution)
Mid: Staff (on same institution)
Low: High-school Instructors


Of course having faculty give you letters of recommendation is better.
Just remember that "usually" you need 2-3 letters of recommendation.

I would suggest to use the letter of recommendation from this director that you mention, If and only if you cant get letters of recommendations from faculty.