The Country Day School movement is a movement in progressive education that originated in the United States in the late 19th century. Country Day schools seek to recreate the educational rigor, atmosphere, camaraderie and character-building aspects of the best college prep boarding schools while allowing students to return to their families at the end of the day. To avoid the crime, pollution and health problems of the industrial cities of the early 20th century, the schools were sited in the 'country,' where wealthy families owned large homes in what would later be known as suburbs.