I applied online. The process took 4 months. I interviewed at Tutor.com (Cincinnati, OH)
Interview
It's a lengthy process. You can test for subjects they don't have a need for at the moment and they will keep your information and contact you when there's an opening.
Interview questions [1]
Question 1
The mock session is key. Remember to clarify the question, give help without giving answers, and check for student understanding.