The Pennsylvania System of School Assessment (PSSA) is a standardized test administered in public schools in the state of Pennsylvania. Students in grades 3-8 are assessed in English language arts skills and mathematics. Students in grades 4 and 8 are also assessed in skills relating to natural science, including the field of data interpretation and analysis. Since 2013, high school students have taken the Keystone Exam in place of the PSSA for their standardized testing. The PSSA's were made by a company in New Jersey. The PSSA is written, owned and administered by Pearson Education. There are reporting categories for each subject which list eligible content to be tested in each grade. Assessment Anchors specify what is considered eligible content for each grade level tested. A Proficient