This document discusses different theories of curriculum. It begins by explaining the concept of theory in general and debates around the "received view" of scientific theory. It then examines different approaches to curriculum theory, including their functions of description, prediction, explanation and guidance. The document also analyzes different frameworks for classifying curriculum theories, such as focusing on their structure, values, content or processes. Specific theorists are discussed, such as Macdonald who viewed curriculum as a social system, and Apple who analyzed the relationship between society and schools through the concept of hegemony.