圆的面积教学设计(Teaching design of circle area) Teaching design of the area of a circle [content] Derivation and applicationf teaching. [] teaching difficulties in the round area formula process students to circle infinite average segmentation "arc” unlimited Close to the "line" of understanding and the circle into a rectangle rectangle's length is half the circumference of a circle of understanding. [method] teaching Teaching guide students to ask questions, analyze and solve problems. Study self exploration and cooperation of inductive reasoning. [] teachers teaching preparation multimedia courseware students makingoutpowerpointcurriculumplan cooperation division to prepare a 16 A circle of 32 equal parts, scissors, rulers, etc. The teaching process [] To create a situation lead. review for Look round please remind students of part of it and the relationship between teachers in each part of the writing on the blackboard In a corner of d=2r c= d=2 r Pi Pi suggested that students know the circumference of a circle and its radius r, what about diameter share put forward the problem Show page sixty-seventh textbook topic map let students observe after questions. Teacher students look at the picture from the picture you find what information information 1 5 workers in a circular garden lawn. 2 a worker is how many square meters deep in the asked circular lawn area The
