I was recommended by my roommate. I received an email detailing requirements including a physics skills test, teaching audition, and a 3 day teaching training. If all three were completed to an acceptable level, one would be hired. The test was based on MCAT style physics questions. They aren't easy. You receive a list of possible concepts that you prepare a short lecture on. The teaching training is a weekend long bootcamp. You must prepare 4 lectures to present to your trainer and fellow trainees.

It was an interview on the phone in which I spoke on a topic for 5 minutes. I chose a topic on Physics and explained it along with the slide show that I emailed them. The person taking my interview acted as a student and I tried explaining concepts by asking questions.