Research On Understanding By Design Of Mathematics Units In Primary School

With the continuous advancement of the new curriculum reform,teaching pays more attention to cultivating students’ discipline core literacy,advocates exploration unit teaching.It also requires students to understand,transfer and apply the knowledge they have learned,and construct the integrity of the knowledge system.As a new mode of teaching design of"starting with the end" and "evaluation first",reverse teaching design is compatible with the concept of talent training in China at this stage.It can not only help teachers grasp and deeply understand the teaching content,improve the efficiency of classroom teaching,and keep the alignment of teaching-learning-evaluation,but also help students construct a knowledge system,understand the essence of knowledge,and learn to learn.In a word,it is conducive to realizing the transformation of subject teaching to subject education.Taking the unit of"Decimal Addition and Subtraction" in grade 5 mathematics as an example,combined with the basic principles and operating procedures of reverse teaching,this study makes a preliminary attempt on the reverse teaching design of primary mathematics units,and tests its effectiveness and feasibility with practice.The research first analyzes the reverse teaching design of primary mathematics pointing to understanding,clarifies the core concepts,the theoretical underpinnings and content of reverse teaching design.,and discusses the applicability of reverse teaching to primary mathematics.Then,taking "Decimal Addition and Subtraction" as an example,combined with the three stages of reverse teaching,the operation procedures of reverse teaching design of primary mathematics units are introduced in detail,and the unit teaching framework is constructed,which is to determine the expected results,determine the evaluation evidence,and design the learning experience.According to this operating procedure,the unit reverse teaching design and specific lesson teaching design of "Decimal Addition and Subtraction"are carried out.After the implementation of the teaching design,classroom observation,expressive task analysis and teacher interviews are used to investigate and analyze the effect of teaching implementation.According to the implementation results,it can be found that the application of reverse teaching in primary school mathematics can effectively improve students’ classroom performance,enhance students’ classroom engagement level,and enhance their sense of classroom participation;it is also conducive to students’ reflection and transfer of knowledge,promotes students’ understanding,and helps to cultivate the core literacy of mathematics;At the same time,for teachers,it helps to change teachers’ teaching concepts and provide new ideas for design.However,it is also found that there are problems such as large workload of teachers,high requirements for teachers’ own literacy and students’ sense of autonomy in reverse teaching.Finally,based on these analyses,this paper reflects on the shortcomings of this study,and puts forward the prospect of follow-up research,hoping to provide some suggestions for other teachers and scholars who have studied reverse teaching design in the future.