 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.Districts in School Improvement status are required by the Pennsylvania Department of Education to develop an Improvement Plan and to submit it for approval by the Pennsylvania Department of Education.