What is your educational philosophy?
Is the preschool you are considering at Montessori, developmental, Reggio Emilia, Waldorf, academic, faith-based, or something else? Parents should look for a school that has a philosophy that is complimentary to their own.
What is the turn over like? What kind of training does the staff receive?
Teachers and preschool directors who have been with the school for a while are likely happy and enjoy their work. This filters down to the children.
Is the teaching staff CPR and First Aid certified? Do they receive continued education classes?