This document discusses curriculum development processes and models. It describes three common models: Ralph Tyler's four basic principles model which emphasizes planning; Hilda Taba's grassroots approach model which involves teachers; and Galen Saylor and William Alexander's model which views curriculum development as consisting of four steps - goals and objectives, curriculum designing, implementation, and evaluation. It also covers foundations of curriculum, including philosophical foundations about education purposes; historical foundations from key thinkers; psychological foundations from learning theories; and social foundations about society's influence on education.