High-quality state assessment systems are the cornerstone of No Child Left Behind (NCLB), making it possible for school systems to collect data on student achievement to diagnose where students are doing well and where they are doing poorly. This provides information that teachers, administrators, and policymakers can use to customize and improve…

After nearly two years in development, a new federally backed research service on "what works" in education began rolling its first products off the assembly line. Launched with $18.5 million in funding from the U.S. Department of Education, the newly operational What Works Clearinghouse is the department's electronic version of a "Consumer…