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Illustrations showing the almost unimagineable range of length scales in the physical universe. A cartoon tour of the history of ideas on the nature of gravity. A report on an educational research project involving the use of modules written with Interactive Physics and pre and post assessments of both the test and control groups using the Force Concept Inventory. A pedagogical approach to geometrical optics emphasizing the physical vergence properties of rays over artifical rules based on algebraic signs. A review of conceptual difficulties with and pedagogically effective approaches to instruction in electrical circuits.