I applied online. I interviewed at Teach for America
Interview
During the process there is a general application, phone interview, and final interview. During the phone interview they ask you questions from your resume and times you have had to manage difficult situations. The people who call are very friendly and do not try to trick you. The more you talk about handing difficult situations=the better.
In the final interview there are about 12 people who also interview with you. You do not have to compete with them (they can offer a position to all of you or none of you). You are asked to do a 5 minute "lesson plan," group problem solving, and a one on one interview.
Interview questions [1]
Question 1
During the final interview they give you a role playing situation in which you have to convince the "principal" (interviewer) that you should be allowed to take a group of students on a field trip (they give you road blocks as to why the trip couldn't be allowed).
I applied through other source. The process took 2 months. I interviewed at Teach for America (Claremont, CA) in Feb 2013
Interview
TFA is very transparent. Prior to my phone and in-person interview, I studied their website and mission diligently (TFA recommends doing this.) I also went online and looked for suggestions as to how best to prepare for the phone and in-person interview. I would highly recommend preparing several (maybe 3 to 4) vignettes that highlight your leadership abilities. It may even be good to detail a time when you struggled or even failed to accomplish a goal. However, if you choose to include a vignette of this type, be sure to make clear the lessons/principles you took away from that experience and how it may have helped you to approach similar situations.
Interview questions [1]
Question 1
TFA is pretty transparent about their interview process. Though, little information is given regarding the actual questions they might ask, they do provide several suggestions in follow-up e-mails about how to tackle and prepare for the interview.