【教学片段】最近,听了一节小学数学国标本教材第八册“梯形的认识”课堂教学,教师设计了以下教学环节:1.生回忆上节课所学的平行四边形的特征;2.师展示生活中的梯形图,并用抽象图画下来,告诉生这就是梯形;3.生自己举例生活中的梯形; Recently, I listened to an eighth grade “Teaching of Trapezoid Recognition” in primary school mathematics textbooks. The teacher designed the following teaching steps: 1. Recalled the characteristics of the parallelogram learned in the previous lesson; Division showcase the ladder of life, and use abstract drawings down, tell the students that this is the trapezoid; 3 students give examples of life in the trapezoid;