It's great that you're providing information via email prior to the interview. Considering the fact that we each have a primary learning style either visual, auditory, or kinesthetic - it's beneficial when we can provide materials and presentations that appeal to all three. Perhaps you can utilize the pre-sent document or brochure during your interview to provide further detail. Or consider another possibility - online schools enroll students without ever having a student step on a ground campus. How can you enhance your approach and interviews to incorporate more visual, auditory and kinesthetic elements?