Research On Teaching Design Of Trigonometry Unit In High School

The general high school mathematics curriculum standards(2017 edition)pointed out "the teaching content should be grasped as a whole to promote the continuity and phased development of the core literacy of mathematics" in the sixth chapter "teaching suggestions".In view of teachers' teaching,a basic problem is how to master the teaching content as a whole.Unit as the unit of education and teaching organization form,can be connected with the unit of content and content,to avoid the fragmentation of single content,so that teachers and students can overall grasp the teaching content in the unit.The content and contents of the unit constitute the step to cultivate the core literacy of mathematics,so that it can be developed in the unit.It can be seen that unit teaching design can solve the problem of appeal.Taking trigonometric function as unit teaching design of senior high school is based on its special geometric and algebraic properties;on the other hand,it contains mathematical ideas such as "transformation and deduction","whole and part";on the other hand,it is because the definition,image and formula of senior high school trigonometric function constitute a system.This paper takes "trigonometric function unit teaching design of senior high school" as the purpose to carry out the research,and the research path is: "literature review--case analysis--case design".The research results are as follows:(1)The origin,development,operation process and characteristics of unit teaching design are summarized.In the part of origin and development,it is considered that it originated from "holism" and developed from "system theory",and on this basis,it is defined.In terms of operation process,the author thinks that the operation process of unit teaching design proposed by Lv Shihu should be followed.If there are too many contents,the teaching design plan in the pyramid form of "large unit--small unit--class hour" can be carried out.The characteristics of unit teaching design are as follows: integrity,theme,stage and situation.(2)According to the characteristics of unit teaching design,determine the evaluation of three principles of unit teaching design,using the three principles to analyze the existing trigonometric function unit teaching design cases.The analysis shows that the complete unit teaching design should include "large unit design" and "small unit design",and each small unit makes up for each other's omissions.(3)According to the unit teaching design process and case analysis results,the teaching design framework of trigonometric function large unit is designed,and two small unit teaching design frameworks of "trigonometric function concept" and "trigonometric formula" are designed under the framework of large unit.Finally,four teaching design cases are given.