The interviewer wants to learn more about your career aspirations and whether or not your plans include remaining at their school for the foreseeable future. It's best to not overpromise or come across like you jump around from job to job often. Frequent turnover makes it hard for schools to gain traction and flourish. Share the time commitment you are willing to commit to the school you are interviewing with and any other education, training, endorsements, credentials, or career changes you foresee within the next five years, especially if that includes growing within the same school.