I was called in for an interview, and was informed it would be a group interview ahead of time. There were three of us, we were interviewed together with three of their staff. We each had to take a short math quiz to assess which grade we would work best with; we were told it did not impact the hiring decision. Then each interviewee was taken to a separate room and had to perform a 5-10 minute activity or mini lesson with a group of 8 or so students. We were also told about this before hand.