教学目标:1.在理解的基础上掌握平行四边形的面积计算公式,能正确地计算平行四边形的面积;2.通过操作、观察、比较,发展学生的空间观念,渗透转化的思想方法,培养学生的分析、综合、抽象、概括和解决实际问题的能力。教学重点:掌握平行四边形的面积计算公式,并能正确运用。教学难点:平行四边形面积计算公式的推导。教学过程:一、导入(出示一个平行四边形。)师:关于平行四边形你都知道哪些知识?生:平行四边形具有不稳定性。 Teaching objectives: 1. On the basis of understanding grasp the area of ​​parallelogram formula, can correctly calculate the area of ​​parallelogram; 2. Through the operation, observation, comparison, development of students’ concept of space, the idea of ​​infiltration transformation, training students The ability to analyze, synthesize, abstract, summarize, and solve practical problems. Teaching focus: master the area of ​​the parallelogram formula, and correct use. Difficult point of teaching: the derivation of parallelogram area calculation formula. Teaching process: First, import (produce a parallelogram.) Teacher: What do you know about parallelograms? Students: parallelogram instability.