Quick interview (15-20 min), basic interview questions (i.e. tell me about yourself), had to prepare 2 pieces to play. They go through your resume to make sure mainly you are available for the times they need and ask you about other commitments you have. They ask if you're comfortable talking to parents as you may need to talk to student's parents to update them on their child's progress. My advice is to be confident, show that you're a verbal person as that is what most of the job is about.