I really like intparent’s suggestion that you ask an interviewer about their experience at a school and how it’s made a difference in their lives. Always a good question.
As an interview prep, get your ‘elevator speech’ in order. An elevator speech is what you would say if you got into the elevator with someone you wanted to impress and they asked you to ‘Tell me about yourself.’ It’s your opportunity to succinctly hit on the aspects you most want to highlight about yourself and would like to talk about during the interview. You will be asked this question, directly or indirectly, often in your life both at interviews and in informal situations where you want to make a good impression - so you might as well have an answer ready to go.
Want to do more prep? Google commonly asked common interview questions. For example: http://collegeapps.about.com/od/theartofgettingaccepted/tp/college-interview-questions.htm