The document discusses concepts, nature, and purposes of curriculum. It defines curriculum broadly as the total learning experiences of individuals in schools and society. Curriculum can be viewed traditionally as a body of subjects or progressively as all experiences guided by teachers. There are different types of curriculum operating in schools, including recommended, written, taught, supported, assessed, learned, and hidden curriculum. The document also discusses Ralph Tyler and Hilda Taba's models of curriculum development and the historical foundations of curriculum thinking from scholars like Franklin Bobbitt, Werret Charters, William Kilpatrick, Harold Rugg, Hollis Caswell, and Ralph Tyler.