Research On The Dynamic Difficulty Of Chemical Conception In"Oxidation-Reduction Reaction"

In the context of the research trend about chemical curriculum and teaching and the curriculum innovation of elementary education in our nation,linking to the ubiquitous problems about elementary chemistry education in practice,the research is established on the viewpoint of dynamic difficulty.The dynamic difficulty is one of the important component of curriculum difficulty,which is the inevitable problem in curriculum design and implementation.The research on dynamic difficulty,involves great significance on the development of curriculum theory and the research of curriculum design and implementation,and also it will bring profound influences on elementary chemistry education practice.The researh choose the chemical conceptions of "oxidation-reduction reaction" as objects,hope to form the basic acquaintances of dynamic difficulty,and provide some corresponding suggestions to the curriculum design and implementation of "oxidation-reduction reaction".On the basis of literature and theorical study,the research forms the basic acquaintances of dynamic difficulty based on two dynamic dimensions(the procedural complexity and the procedural obstruction),constructs the research model.On the basis of the study on experiment,the research demonstrates the theoretical acquaintances of dynamic difficulty.On the basis of the study on survey,the research gets to know the holding of dynamic difficulty of teachers,which based on their teaching knowledges and experiences.After conclusion,the research states the revelations,and looks forward to the future research.Based on the theoretical and demonstrative method,the research gets the follow six conclusions to the dynamic difficulty and the dynamic difficulty of chemical conception of "oxidation-reduction reaction".(1)The procedural complexity and the procedural obstruction are the two important dynamic dimensions of curriculum difficulty.(2)In order to have a fully acquaintances of dynamic difficulty,the researchs should be done by basing on the different roles and fuctions of educational subjects in education process.(3)The curriculum static difficulty acts as the media between students,teachers and dynamic difficulty,and it can not affect conception’s dynamic difficulty without students’learning and teachers’teaching.(4)The differences of the conception’s properties in "oxidation-reduction reaction" causes the differences of its dynamic difficulty.(5)The students’learning ways of "oxidation-reduction reaction" and the teachers’teaching ways of it will influence its dynamic difficulty.(6)The students’ cognitive abilities determines the dynamic difficulty of chemicalconception in "oxidation-reduction reaction" crucially.This dissertation involves five chapters.Chapter one introduces the contexts,the meanings,the goals and the methods of the research.Chapter two presents the research model established through the theoretical research.Chapter three presents the methods,the process and the results of the experimental research on students’learning.Chapter four presents the methods,the process and the results of the investigationon on teachers’ teaching.The last chapter states the conclusions,states the revelations,and looks forward to the future research.