I always send people to the online sites too. We also have a magazine that compares schools by graduation rates, number of kids entering college, student to teacher ratio, etc. It is a good idea to offer to take the parents to the local schools once they found a home to make sure they're comfortable with the administrators and the feel of the building. Be sure they know you're coming. I don't really like to comment too much on the schools, it could sound like steering.