The Harvard interview doesn’t test your subject skills, and in fact bears little resemblance to the Oxbridge or UK equivalent: it is an opportunity for you to talk about things that matter to you (both academic and outside of school), so that the interviewer gets to see what kind of person you are.
The interviewer’s job is to find out enough about you so that he or she can ‘make the case’ for you back to the Admissions Office when writing their report. Harvard looks for outstanding students, but just as importantly, wants to find people who will be a good ‘fit’ in their community and make a contribution to its life. The calibre of student who applies to Harvard tends to be very high; the challenge is to find individuals who are also exceptional in other ways and who will make their mark among exceptional peers.
Your Harvard College interview will be organised by the Harvard Club of the UK, and once you have submitted your application, you will be contacted by a member of the Club who will arrange a convenient date and place to meet.