Be sure to have researched the educational facility before the interview. You will want to answer this based on how your career goals, interests and abilities best align with their specific mandate.
"I am most drawn to working with students on the Autism spectrum. Finding unique ways to work with individuals with neurodevelopment disorders is an important challenge and one that I am happy to take on. One of the reasons I was so thrilled to be shortlisted for this position is because of the strong work you do with students with Autism."