In preparing this second edition, a fresh look was taken at literature describing practices and concepts relating to theory development in behavioral disciplines related to education for cues leading to a discussion of curriculum theory. In the belief that curriculum theory must be a subtheory of educational theory, the broad field of education was examined for developments of relevance to curriculum theory. Milestones in the development of ideas about curriculum theory are noted. Theoretical issues, problems, and alternatives within the areas of curriculum design and curriculum engineering are examined. Curriculum as a field of study is discussed. Some of the value concepts and generalizations which may be classified as substantive knowledge are identified, and the ways in which curriculum is responsible for helping students to deal with value problems and to come to accept values as rules governing their own behavior are outlined. At the end of each chapter is a list of suggested readings. (Author/JY)