This document discusses curriculum development and different models for developing curriculum. It defines curriculum as both a listing of subjects to be taught and the total learning experiences of students. Curriculum development plays an important role in improving a country's economy and addressing social issues. The document outlines four phases of curriculum development: planning, designing, implementing, and evaluating. It then describes several models for curriculum development, including Tyler's top-down model, Taba's grass roots bottom-up model, and the Saylor and Alexander model which involves setting goals and objectives, designing, implementing, and evaluating the curriculum.