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About - U.S. State Participation

A number of U.S. states have participated in TIMSS, PIRLS, and PISA as separate education systems. State participation in international assessments provides them with the opportunity to assess the comparative international standing of their students' achievement and skills, and to view their curriculum and instruction in an international context.

For a list of states that have participated in each assessment, please view the county lists for TIMSS, PIRLS, and PISA. †