At this stage of the interview the examiner will say something on the lines of:
Q: In this part of the exam I'm going to give each of you three photographs and I'd like you to talk about them on your own for about a minute and also to answer a question briefly about your partner's photographs.
Q: Here are your pictures (Candidate A). They show people in different educational settings. I'd like you to talk about two of these photos and compare the settings and say how the students may be feeling in each one.
Q: All right?