This document discusses key concepts, philosophies, and designs related to curriculum development. It defines concepts as the materials used to achieve educational outcomes, philosophies as frameworks for organizing curriculum, and design as how curriculum components are arranged and interconnected. The document then examines different pairings of concepts, philosophical bases, and designs, such as academic rationalism with perennialism/realism and subject design, cognitive process with pragmatism and broad field/learner-centered design, and technological process with realism and subject design. Each combination is described in terms of its focus and approach to curriculum.