“电影院”是北师大版三年级下册第三单元的一节计算课,主要让学生掌握两位数乘两位数(进位)竖式计算方法,学生在前一节课已经学习了两位数乘两位数(不进位)的计算方法。所以,本节课我引导学生独立地探索了两位数乘两位数的算法。一、自主探究促进课堂教学有效在学生观察了情境图,找到数学信息后,由学生独立地列出算式。然后教师要求学生用自己喜欢的方法独立计算,将计算过程写在本上。学生马上进入了积极思考的状态,我在巡视时,发现了部 “Cinema ” is a section of the third unit under the third grade of Beijing Normal University version of the calculation unit, mainly for students to master the double-digit by double digit (carry) vertical calculation method, the students have learned in the previous lesson The calculation of two digits by two digits (not carry). So, in this lesson I am leading the students to explore the algorithm of double-digit and double-digit independently. First, independent inquiry to promote effective classroom teaching Students observed the situation map, find the mathematical information, the students list the formula independently. Then the teacher asks the student to calculate independently with the method that oneself likes, writes the calculation process in the book. Students immediately entered the state of positive thinking, and I found the ministry while visiting