The International Association for the Evaluation of Educational Achievement's (IEA) mission is to enhance knowledge about education systems worldwide, and to provide high-quality data that will support education reform and lead to better teaching and learning in schools. In pursuit of this aim, it conducts, and reports on, major studies of student…

A national literacy professional development project reduced the achievement gap for students experiencing difficulties in reading or writing in 91 of New Zealand's schools. It was based on two premises: coherence within and between the multiple levels of the schooling and educational administration systems, and a focus on evidence-informed…