This document defines curriculum design and describes four common types: subject-centered, learner-centered, problem-centered, and core learning designs. It also discusses macro and micro levels of organizing curriculum content. Subject-centered designs organize curriculum by subjects or academic disciplines. Learner-centered designs focus on students' needs, interests, and development. Problem-centered designs use real-world problems and themes. Core learning designs emphasize common subjects, skills, or knowledge required for all students.