This year the Center on Education Policy analyzed data on the achievement of different groups of students in two distinct ways. First, it looked at grade 4 test results to determine whether the performance of various groups improved at three achievement levels--basic and above, proficient and above, and advanced. Second, it looked at gaps between…

This report examines data from the Washington Assessment of Student Learning (WASL), focusing on the achievement gap in Washington state public schools. It uses scale scores rather than simply "percentage meeting standard"; analyzes data on both individual and building levels; and displays data in many different ways designed to clarify…