This document discusses different approaches to organizing elementary, middle, and high school curriculums. It describes the traditional graded elementary school model and alternatives like nongraded schools, open education, and activity-based curriculums. For middle schools, it compares the junior high school and middle school models, noting that junior high schools often mirrored high schools while middle schools emphasized exploration and core curriculums. The document also briefly outlines different high school and magnet school approaches before analyzing factors that influence curriculum organization decisions.