The Office of Superintendent of Public Instruction released its 2009 Adequate Yearly Progress (AYP) report, part of the federal government’s No Child Left Behind requirement, last week.

According to the data, only one Washington school district with 2,500 or more students — Mercer Island — met all the AYP progress requirements. Three districts, Mercer Island included, with 1,000 or more students met AYP standards, and 10 districts with 500 or more students met all the requirements.

The state of Washington has a total of 296 districts. Between 90 and 100 districts have 2,500 students or more.

According to the 2008 spring Washington Assessment of Student Learning (WASL) score report, Mercer Island’s students scored at least 80 percent or above in every WASL test delivered to grades 3 through 8 and grade 10. Statewide, 86 school districts met AYP standards and 209 did not.

In Washington, AYP is primarily a measure of year-to-year student achievement on the WASL in reading and mathematics. It is a staple of the No Child Left Behind Act.