“平行四边形的面积”是在小学数学图形与测量教学中的一节典型课例,学生已有的知识基础是面积、面积单位与长方形的面积。在此基础上,首先创设情境,让学生提出问题,猜测平行四边形的面积可能与哪些因素有关。猜测之后让学生想办法验证。根据已有的经验,学生自然想到用学具“面积单位纸”测量平行四边形的面积进行验证。 “Area of ​​Parallelogram ” is a typical lesson in elementary school mathematics graphics and measurement teaching. Students have the knowledge base of area, area unit and rectangle area. On this basis, first create a situation, so that students ask questions, guess the area of ​​parallelogram may be related to what factors. After speculation students think of ways to verify. Based on the experience gained, students naturally think of verifying the area of ​​a parallelogram with the aid of “area unit paper”.