sentences:  In 2011, 46.9 percent of Pennsylvania school districts achieved Adequate Yearly Progress (AYP) based on student performance.An additional 37.8 percent of school districts made AYP based on a calculated method called safe harbor, 8.2 percent on the growth model and 0.8 percent on a two-year average performance.In 2011, Marple Newtown School District's graduation rate was 97.36%.