任何教学活动形式,都需要从儿童本位出发,结合学情进行有效的策略定位。课堂教学要结合学情,对学生资源进行合理开发和有效运用,从而促进儿童发展。一从儿童合作学习出发应从小培养学生的合作意识,养成与人合作的习惯。教师在引导操作时,要有意识地创设有利于合作的活动,促进学生合作能力的提高。教学梯形面积计算公式时,上课开始,笔者先让学生猜一猜梯形面积计算公式怎样推导(小组讨论)。通过讨论,学生大胆猜测,学生甲说:“用两个完全一样的梯形, Any form of teaching activities, all need to proceed from the children’s standard, combined with the learning situation for effective strategic positioning. Classroom teaching should be based on the combination of learning and resources, to reasonably develop and effectively utilize student resources so as to promote the development of children. First, starting from the children’s cooperative learning, we should cultivate students’ awareness of cooperation and develop the habit of cooperation with others. When teachers guide the operation, they should consciously create activities conducive to cooperation and promote the improvement of students’ cooperation ability. Teaching trapezoidal area formula, the beginning of the class, I let the students guess the trapezoidal area calculation formula how to derive (group discussion). Through discussion, students boldly guess, Student A said: ”With two exactly the same trapezoid,