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我认为北师大版数学六年级上册第三单元“搭积木比赛”(第32页)的教学值得商榷。比赛二:搭一搭。一个立体图形,从正面看到的形状是□□□□,从左面看到的形状是□□。搭这样的立体图形,最少需要几个小正方体?最多可以有几个小正方体?请两个队分别搭一搭,说一说。教科书上呈现了两种搭法,意在让学生通过观察、思考、操作、讨论和交流等活动,体会根据从两个方向看到的图形,不能确定唯一一个物体,而是会有不同的情况,从而激发学生的想象力,培养动手操作
I think the teaching of the third unit of the sixth grade on the sixth edition of the National Taiwan Normal University “take the building blocks game” (p. 32) is debatable. Competition two: take a ride. A solid figure, the shape seen from the front is □□□□, the shape seen from the left is □□. Take such a three-dimensional graphics, at least a few small cubes? There can be a few small cubes? Please take a ride of the two teams, to talk about. Textbook presents two kinds of exercises, intended to allow students to observe, think, operation, discussion and exchange activities, experience from the two directions to see the graphics, can not determine the only one object, but there will be different situations , So as to stimulate students’ imagination and cultivate hands-on operation