“平行四边形”的教学,是在学生掌握了长方形和正方形的特征基础上进行的。平行四边形有什么特点,与长方形、正方形有什么联系,是学习平行四边形的重点。通过本课学习应该使学生认识四边形,建立平行四边形的概念,形成表象,为今后的学习打下基础。教学时可采取直观演示、动手操作,量一量、画一画等方法,让学生掌握所学图形的特征。 一、抓住新旧知识的内在联系,复习引入 The teaching of “parallelogram” is based on the students grasping the characteristics of rectangles and squares. What are the characteristics of parallelograms, and rectangular, what is the square, is the focus of learning parallelograms. Through this course, students should know the quadrilateral, establish the concept of parallelogram, form an appearance and lay the foundation for future study. Teaching can take an intuitive presentation, hands-on operation, the amount of a painting, painting and other methods to enable students to master the characteristics of the graphics learned. First, seize the old and new knowledge of the intrinsic link review review