High-quality assessments are vital for ensuring a sound and equitable education for all students. Tests are used to measure what students know and can do, and this information is very important for both instructional and accountability purposes. This brief, which should be read as a complement to "High-Quality College and Career Ready…

Among international competitors, the U.S. is an economic leader but trails in many aspects of teacher preparation, investment, and continuous improvement. To change this situation requires a multi-part and comprehensive strategy. The good news is that examples of encouraging reforms exist in many places, and strong evidence shows that these…

Until recently, states focused on ensuring the presence of a "highly qualified teacher" in every classroom. Under the 2001 reauthorization of the Elementary and Secondary Education Act (ESEA), known as No Child Left Behind (NCLB), this title described a teacher holding at least a bachelor's degree and the appropriate state license and…

Teachers have the greatest school-based effect on the achievement of any child in their classrooms, but highly effective principals can positively affect the achievement of every student in their schools. The difference between a highly effective principal and an average one is equal to two-to-seven months of extra learning per year for each child…