Value Proposition / Benefits:
Target customers are parents and prospective students. The main benefit is that they can get all the quantitive information about a school or school at one place. They can easily find a 5/5 rated school within their geographic preference.
The key differentiator for my proposed site is that it will have ratings for all schools. If you live in a certain neighborhood, you can quickly find the rating for the schools in your county. In addition, since the schools are rated by current and former students, the overall ratings will have good accuracy.