Interviews at schools are often led by vice principals, principals, or some other school administrators. These people aren’t professional interviewers, they specialize in other fields, and they often struggle to compare the interview answers of the job applicants, and they can’t decide the winner based on these answers. But they still lead an interview and they have to take a decision at the end.
Personal preferences matter
Since most applicants are similar in terms of education and experience, the interviewers will often choose the one they like personally, a teacher that has the same attitudes, opinions and hobbies as they have themselves.
Look around, find something you have in common
Look around the office. You may find some pictures or other things that indicate hobbies, interests and opinions of your interviewers. You can sometimes deduct these things also from the discussion you have with them.
Try to find something you two have in common, and elaborate on it. Mutual hobbies, interests, opinions–all of these help to build friendship and affinity.
And should you like to play musical instrument, or go to the nature, definitely mention these hobbies in your answer. It shows the range of activities you can do with the children in school.