Research On High School Students' Alternative Framework About Geometrical Optics

Investigation of the preconceptions in students' cognitive structures and conceptual change teaching has been a focus of international physics education over several decades. It's also a great challenge to our educational reform.The cognition that students formed through the perception of daily phenomenon of life and long-term experience and studying formed with the distinguishing type before their accepting formal scientific conceptions, is called scientific preconception (abbreviated to preconception). Preconceptions include scientistic conceptions and misconceptions, and those which are produced during the course of learning. So the misconceptions have many kinds of manifestation to form a framework which is called alternative framework.Under the guidance of conceptual changing theory, we drafted Diagnostic Test On Geometrical Optics Alternative Framework which includes 20 questions. After that, we investigated 629 high'school students and obtained 26 typical misconceptions. We summarized the types of the alternative framework and its formative cause. Strategies and methods to change the alternative framework are also proposed in the thesis. Finally, we arranged a control-class and a contrast-class and carried on a teaching experiment.The investigation indicated that there are mainly 8 types of the alternative framework: Light isn't a kind of matter; The propagation of light is similar to the mechanical movement of a macroscopic object; A shadow is a real object; Rays is a real object; The reason of seeing an object is the light sent out from eyes; The virtual image in the mirror depends on the observer; Only the full convex lens could...