Admissions interviews of any sort (be it for prep school or for college) are the school's chance to get to know you better as a candidate. Keep in mind that these are two-way conversations - this is also your chance to get to know the school better as well!
For starters, a few pre-interview items to note:
(A) Dress appropriately. Nice pants, nice dress, nice shirt. (B) Don't chew gum and no cell phone use. Often, we ask that students leave their phones in the car (so that there is no temptation). (C) When greeting, shake hands and look the admissions representative or officer right in the eye. (D) Try your very best not to be nervous. The more you practice, the more you understand about the school, and the more you'll realize just how much this next step means for you. With that, your nerves will slowly wash away and confidence will work to take over. A good ice-breaker? They'll without a doubt ask you something similar to "How are you feeling?" And, since you're working to be completely honest and show a reflection of yourself, there is no harm in stating, "I'm a little nervous, but I'm really excited too to speak with you." (E) After the interview (and/or tour) be sure to send a thank you note to the interviewer.
Questions You'll Be Asked: (1) Why are you applying to prep school/college? (2) Why are you applying to OUR school in particular? (3) Why do you feel OUR school is a good fit for you? (4) Talk to me about your educational experience. How is this year going? (5) What are your academic goals? (6) What are you athletic goals? (7) Do you like learning? (8) What do you like to do in your free time? Do you have any hobbies? (9) What are you most passionate about? (10) Tell me about a personal achievement you are proud of? (11) What was a challenge you have faced? Did you learn anything from that? (12) What are your strengths as a student and as a person? (13) What are some things that you'd like to develop and work on? (14) What is the most important thing you want me to know about you? (15) What makes you unique? (16) What is your favorite book? Why? (17) Tell me about your family. (18) Have you ever been away from your family for a long period of time? (As you will encounter at school.) (19) Is there something else you'd like to tell me that we haven't talked about already? (20) Do you have any questions? (and the answer here is ALWAYS 'Yes', come prepared!)
Those are core questions that each and every school will draw from. Let us know if there are questions by emailing firstname.lastname@example.org and good luck!