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教学《三角形面积》,在最后巩固练习的环节采用分层练习的做法,根据学生不同的学习能力和学习水平,自主选择不同难易程度的练习题。学生分类与练习分层方法如下:练习设计如下:A:1.平行四边形面积=()×(),三角形面积=()×()÷()2.画出三角形的高,测量并计算面积。3.画出三角形的高,测量并计算面积。4.一块三角形麦地,底边长60米,高是50米,求它的面积是多少?
Teaching “triangle area”, the practice of the final consolidation exercises stratified practice approach, according to the students different learning ability and level of learning, autonomy to choose different levels of difficulty exercises. Student classification and practice stratification method is as follows: Practice design is as follows: A: 1. Parallelogram area = () × (), triangle area = () × () ÷ () 2 draw the height of the triangle, measure and calculate the area . 3. Draw the triangle high, measure and calculate the area. 4. A triangle of corn, the bottom 60 meters long, 50 meters high, asking what is the area?