Research On The Strategy Of Designing "Problem Chain" In The Teaching Of Plane Geometry In Junior Middle School

The Mathematics Curriculum Standards for Compulsory Education(2022 Edition)proposes to establish core competency-oriented curriculum objectives,take student development as the foundation,and develop students’ ability to use mathematical knowledge and methods to discover,propose,analyze and solve problems(i.e."four abilities").This study applies the "problem chain" teaching mode to the teaching of plane geometry in junior high school,and by setting a series of logically close questions in the recent development area,students can answer and can answer,accelerate the teaching progress,and guide students to realize the transformation of "geometric intuition-geometric abstraction".Therefore,how researchers can set up a reasonable "problem chain" teaching strategy is one of the important topics that need to be studied.Through reading a large number of literature,the relevant research on "problem chain" at home and abroad is collated,and the relevant concepts of "problem chain" and junior high school plane geometry teaching are defined.A questionnaire on the teaching status of "classroom questioning" in plane geometry was distributed to students,and mathematics teachers were interviewed to analyze the current situation of "classroom questioning" teaching in junior high school,and it was concluded that from the overall situation of students,students have a certain dependence on teachers.In the current geometry teaching in junior high school,mathematics teachers will ask questions,but it is difficult to maximize the efficiency of questioning teaching.Teachers believe that the "problem chain" teaching design is challenging in the actual implementation process,and has high requirements for teachers and students.Teachers have high expectations for introducing "problem chaining" teaching into the junior high school geometry classroom.Carry out relevant theoretical discussions,study the design principles and types of "problem chain" of junior high school plane geometry teaching,and propose the design strategy of "problem chain" of junior high school plane geometry teaching according to the design principles and types: use the "problem proposal table" to design the main teaching line of "problem chain";Design the "problem chain" in combination with the actual situation;the application of modern information technology to "problem chain" teaching;Create corrective "problem chains" at error-prone points;Design a "problem chain" variant exercise and propose to divide the implementation process into four stages: preparation,design,implementation and evaluation.Guided by relevant theories,experimental classes and control classes were set up to conduct teaching experiments,and students were tested for geometry grades and geometry learning attitudes,and concluded through data comparison: "problem chain" teaching has an improving effect on geometry learning attitudes,but the improvement of geometric grades is not obvious enough.According to the above research,suggestions for improving the "problem chain" of junior high school plane geometry teaching are proposed: the design of the "problem chain" of junior high school plane geometry should emphasize thinking variation;The design of the "problem chain" of plane geometry in junior high school should grasp the essence of knowledge and understand knowledge in multiple dimensions;The implementation of the "problem chain" of plane geometry in junior high school requires a good grasp of the relationship between "preset" and "generation".