This document summarizes two curriculum development models: the Tyler model and the Taba model. The Tyler model, developed by Ralph Tyler in 1949, emphasizes a top-down approach with administrators designing the curriculum and teachers implementing it. The model outlines four fundamental principles including determining educational purposes and organizing educational experiences. The Taba model, developed by Hilda Taba, modifies Tyler's model to involve teachers in the creation process and place student needs at the forefront through a bottom-up approach. Taba's seven step linear model begins with diagnosing learner needs and ends with determining evaluation.