Very simple, talked to the manager for 10-15 minutes to discuss work history and why I wanted to work there. May have you "try out" the job on the day of interview by letting you experience grading/talking to students.
Lots of simple questions about maths and English eg numeracy, advanced maths, reading, what you like reading etc. If you like teaching. Not very in depth. Mostly easy questions. Some personal questions too.
Sit down and talk about yourself, and what you want to do int the future. Not really about your experience. The want individuals that can work with kids. Good job for someone in high school.