Teaching Research On Elemental Compounds Based On Classification View And Transformation View

Inorganic elemental compounds(hereinafter referred to as elemental compounds)play an important role in high school chemistry.Although there is less space in elemental compounds in the compulsory part of the PEP,the examination of this part of the college entrance examination is not diminished.This part of the knowledge teachers and students generally feel that it is easy to learn and difficult to remember,or will not be applied after the memory.For example,in recent years,the college entrance examination hot topic inorganic process problem is actually based on the elemental compound part,to examine students' comprehensive application ability and information processing ability.At the same time,the new curriculum standards also pointed out that the requirements of this part are to be able to predict the chemical properties and changes of substances,preliminary experiments on design experiments,and to analyze and explain relevant experimental phenomena.Therefore,the requirements for students not only stay at the level of simple cognition and memory,but also require students to change from"knowledge-based" to "conceptual construction" through this part of the study.Therefore,this study uses the knowledge of elemental compounds as a carrier to try to explore the learning status of elemental compounds in high school students,the teaching ideas of elemental compounds,the two-dimensional map of elemental prices,the establishment of classification of students,and the two-dimensional map of elemental prices.Create four questions.Research is carried out through literature,experimental,interview,and investigation methods.The research content has six parts:The first part is a review of research topics,mainly expounding the question,research background and significance,-research content and research methods.The second part is the literature review,using the literature method to define the core concepts,researching relevant research at home and abroad,and proposing the research ideas based on the predecessors.The third part is the experimental research.Firstly,the questionnaires are used to test the experimental class and the control class,and the current situation of the elemental compounds in the two classes is investigated.The fourth part is the strategy to improve the learning status of elemental compounds in high school students.The fifth part is the research results,expounding the transformation of students' chemistry learning interest,elemental compound cognition and learning methods by using two-dimensional graphs of element valence.At the same time,it also states the construction of the classification view and transformation view of the students using the two-dimensional map of the element price class.Finally,it also analyzes the classification view and the transformation view of the students at different levels.The sixth part is the research innovation and the enlightenment The seventh part is the lack of research and prospects.Analyze and tidy the previous article,summarize the research conclusions,and explain the enlightenment of this research on teaching.The research conclusions are as follows:(1)Students in the elemental compound part of the simple cognitive overall mastery.Students have mastered the typical materials and their properties listed in the textbook,and the students have reached the "memory/memory dimension" in Bloom's cognitive dimension.(2)The use of two-dimensional maps of elemental valence can improve students'participation in classrooms,develop students' ability to model their thinking,and be brave enough to explore problem-solving skills when encountering difficulties.(3)The use of two-dimensional maps of elemental valence plays an important role in the establishment of the classification concept of students.Whether it is a poor student or a medium-sized student or a eugenic student,they can actively apply the model from the perspective of material category and valence in the face of unfamiliar situations and material.(4)The use of two-dimensional maps of elemental valence has a very important role in the establishment of the concept of transformation of students.Students at all levels of the experimental class are clearer than the control class in terms of material conversion and reagent selection,and the scoring rate is also high.When the situation is applied to the migration of the learned knowledge,the ability of the experimental class students is significantly higher than the control class.