In the United States and Canada, a school of education (or college of education; ed school) is a division within a university that is devoted to scholarship in the field of education, which is an interdisciplinary branch of the social sciences encompassing sociology, psychology, linguistics, economics, political science, public policy, history, and others, all applied to the topic of elementary, secondary, and post-secondary education. The U.S. has 1,206 schools, colleges and departments of education and they exist in 78 per cent of all universities and colleges. According to the National Center for Education Statistics, 176,572 individuals were conferred master's degrees in education by degree-granting institutions in the United States in 2006–2007. The number of master's degrees conferred has grown immensely since the 1990s and accounts for one of the discipline areas that awards the highest number of master's degrees in the United States.
Schools of education are historically rooted in the 19th-century normal schools. After the Civil War, universities began to include instruction in pedagogy, competing with normal schools in the preparation of teachers. Teachers College, Columbia University is the oldest graduate school of education in the United States, founded in 1887. Pedagogy and psychology, which previously were considered to be subsets of philosophy, gained status of legitimate collegiate academic disciplines thanks to William James and John Dewey. By 1900, most universities had some formal instruction in pedagogy. For a long time teacher education, curriculum, and instruction remained the core offering of schools of education.
By the 1930s, schools of education started training educational administrators such as principals and superintendents, and specialists such as guidance counselors for elementary and secondary schools.
Many graduates of schools of education become involved in education policy. As such, issues such as equity, teacher quality, and education assessment have become focuses of many schools of education.