The Analysis And Change Of Chemical Misconception In Junior Middle School

Along with the new curriculum reform,chemical concept teaching is more and more attended from teachers.The teacher no longer it alone, but the concept teaching as a constant motion and change and development process. Constrcutivism Learning Theory maintains that the students learning a concept, rather it is the result of what students do with the result the new information they are attended.In other words,students are failed by life experience and teaching contents,and this thought is inconsistent with scientific concepts,and the thought is called "misconcep-tion".Mis-conception is most important factor of affecting middle school chemistry teaching.Misconception has very important theoretical and practical value.Meanwhile,the traditional teaching in chemistry concept has many disadvantages and defects, in the teaching process,Students often tend to observe some phenomen-ons of those accord with their own viewpoint and ignore those evidences that go against themselves.But in essence the supposition and presumption of students are that students explain observed facts using what they already know.However,some basic features of misconception are obstinacy,implicit,experiential, otherness,causing students hardly to change or give up their own ideas.Only when teachers help them correct misconception and build effective frame in order to improve students' scientific level,improve the ability of analysis and solution of problems using science knowledge,promote students'cognitive capability.Therefore,in teaching practice,prob-Ing misconceptions which exists among students and how to change their concepts are the emphasizes of research.The research take the junior middle school students as the research object,using questionnaire method combined with interviewing method, investigates their chemi-cal misconception and analyse misconception'current situation of students and the reason and on this basis puts forward corresponding countermeasures.These counter-measures aimes at solve the following problems in the students'learning process of chemical concept:lack of initiative,lack of correct way of learning and thinking train-ing,and so on. They provide a new teaching approach for traditional concepts teach-ing. Through series of empirical researches,it has arrived at the following conclusion. 1.There is misconception in each core concept of junior middle school students and the more abstract concept produces misconception more easily.2.Students'life experience and personal cognitive ways is the main reason produc-ing the misconception.3.Make students actively transform their misconception through creating context trigger cognitive conflict; through inquiry experiment promoting the formation of the scientific concepts and then make the students master them; make their cognitive structure more perfect through drawing conceptual graphs.