《函数的概念(一)》教案(国外英语资料).docVIP

《函数的概念(一)》教案(国外英语资料) What is important is not the quantity of knowledge, but the quality of knowledge. Some people know a lot, but they dont know the most useful things. - Tolstoy Function concept (1) lesson plan Tongxiang No.2 Zhao Hongmei Teaching purpose: 1. Knowledge and skills: understand the concept of function and understand the three elements that make up a function. (subject guidance) Some definitions and domains of simple functions are sought; 2, process and method: through rich examples, we further understand that function is an important mathematical model describing the dependencies between variables. On this basis, we learn to describe functions in terms of sets and corresponding languages. 3, emotion, attitude and values: realize the role of correspondence in describing the concept of function; Teaching emphasis: understanding the modeling idea of functions, and describing functions in terms of sets and corresponding languages; Teaching difficulties: the understanding of the meaning of symbols Teaching process: First, introduce the subject 1, review the functions of the junior high school, and emphasize the model thinking of function; 2, reading textbooks cited examples, the realization of the function is to describe the law of changes in the objective of the mathematical model of thinking: (1) the relation between projectile firing height and time variation; (2) the relation between the area of Antarctic ozone hole and time; (3) the relationship between the Engel coefficient and the time change of Chinese urban residents since the 85 program 3. Guide students to apply sets and corresponding languages to describe dependencies between two variables in each instance; 4, according to the concept of function learned in junior high school, to judge whether the relationship between two variables in each instance is a function relationship Two 、 function, concept, teaching and Application (1) the concept of function 1, the concept of function: Let be a non