Analysis Of The Reasons For The Difficulty Of Folding And Unfolding The Geometric Figures Of Primary School Students And The Research On The Countermeasures

Geometric expansion and folding is one of the geometric bases.It is the basis of establishing the spatial concept to imagine the unfolding and folding graphs.The surface area can be obtained by using the relationship between the expansion graph and the three-dimensional figure,and the relative surface after the cube folding can be found,etc.In the process of teaching folding and unfolding,it is found that students are difficult to imagine the problems of folding and unfolding,and the hands-on operation in classroom teaching is just a mere formality.Students rely on memory and operation to complete the problem,the practice error rate after class is high,the students lost their interest in geometry,the curriculum standard requirements can not be achieved,thus affecting the later.Therefore,it is necessary to investigate and study the causes of the difficulties in the development and folding of students' geometry,and to scientifically analyze the causes of the difficulties,and to give the teaching strategies suitable for the students' development in the light of the problems that arise "the right remedy for the case".Thus,it lays a good foundation for the cultivation of students' spatial concept,and at the same time,raises the students' spatial imagination ability and logical thinking ability.In this paper,164 students of Jingqi Road No.1 Primary School in Jinan City were investigated by means of questionnaires and interviews.The results of the investigation show that there are several difficulties in the folding and unwrapping of geometric figures: the students have difficulties in unwrapping the three-dimensional graphics in operation,the students do not understand the teacher's method of unfolding,and the students have difficulties in the process of unwrapping the three-dimensional graphics in the process of operation,and in the observation of the students,the difficulties are also found.The process of unfolded folding can not be imagined or imagined for a long time,and students can not clearly express the process of unfolding folding with mathematical language.The student can't draw the three-dimensional figure and the unfolded drawing that is the final presentation of thefolding and unwrapping.Form;the student is difficult to understand the relationship between the development map and the stereoscopic surface.According to the questionnaire of teachers and the interview of students,the reasons for students' difficulties are summarized as follows: teachers lack of dynamic display and effective observation in class,teachers' requirements for students' preparation before class are not uniform;Teachers leave too little time for students to work alone in class;after operation they do not strengthen in time;lack of language expression training;lack of guidance of imagination methods;sometimes inappropriate use of the order of operation imagination;Teachers are too single and emphasis on memory in the guidance of students' methods of doing problems.In view of the reasons,I put forward the following teaching suggestions and basic teaching requirements: teachers should make good preparation for guiding learning and learning tools before class,teachers should guide students to observe the combination of dynamic change and change in teaching,and help students to form dynamic appearance;To guide students to operate,to help students strengthen the appearance in their brains,to pay attention to the training of students' mathematical language,to enable students to reproduce the process of unfolding and folding in their brains,and to pay attention to the induction of imaginative methods in teaching.Assist students to imagine the process,avoid blind imagination;reasonable arrangement of operations in teaching,imagination order,avoid heavy operation light imagination;in addition to the above suggestions to improve students folding and exhibition In addition to space imagination,teachers should also strengthen the guidance of logical reasoning methods in practice.In teaching,teachers should deeply study teaching parameters,strictly follow the curriculum standards,and pay close attention to students with learning difficulties at any time.According to their learning to change the form of teaching,and usually pay more attention to other versions of teaching materials to learn from each other.