一、调动每个学生的积极性在数学课堂的探究活动中,探究的主体活动是在课堂上展开的,课堂上师生之间的活动要在一定时间内完成,有效的教学未必取决于课堂活动时间,而是取决于其中的有效活动时间。如这样一个教学片段:一位老师在教学四年级“用竖式计算小数除法”时,在黑板上写了四道题指名学生板演。因为小数除法的竖式计算需要时间思考,一开始前面的同学计算时,下面同学都在认真观察,但不到一分钟,就有同学分心做其他 First, to mobilize the enthusiasm of each student In the inquiry activities of mathematics classroom, the main activity of inquiry is carried out in the classroom, the activities of teachers and students in the classroom should be completed within a certain period of time, effective teaching may not depend on classroom activities Time, but it depends on the effective time of the event. Such as a teaching fragment: a teacher in the fourth grade of teaching “when using the vertical division of the decimal ”, wrote four questions on the blackboard named student board performance. Because the decimal division of the vertical calculation takes time to think about the beginning of the calculation of the students, the following students are carefully observed, but less than a minute, there are students distracted to do other