“三角形的特性”是一节比较经典的课了。我听过许多特级教师上过,他们的课都各有特点,各具特色。课的大致结构是:一、通过找生活中的三角形来引出三角形;二、通过学生观察、画来总结三角形的特性;三、学生做三角形的学具和观察生活中的三角形的应用来感悟三角形的稳定性;四、认识、画三角形的底和高。这些环节设计的环环相扣,实在是无 “Triangle characteristics ” is a more classic class. I've heard many great teachers who have their own characteristics and different characteristics. The general structure of the class is: First, through the triangles of life to lead to the triangle; Second, through student observation, painting to sum up the characteristics of the triangle; Third, the students do the learning of triangles and observe the application of life triangle to perceive the triangle The stability; Fourth, understanding, painting the bottom of the triangle and high. The interlocking design of these links is really nothing