一、学习目标1.通过看一看、摸一摸长方体学具,初步感受长方体面、棱、顶点的特征;2.通过拼插长方体活动,经历从现实情境中抽象出长方体的过程,进一步发现长方体的面、棱、顶点的特征,知道正方体是特殊的长方体;3.在拆分长方体的过程中,能发现影响长方体形状和大小的关键因素即:长、宽、高。4.将学习平面图形的方法迁移到立体图形的学习中来,在活动中,逐步领悟观察、分类、比较等学习 First, the learning objectives 1. Through the look, touch the cuboid learning, initially feeling rectangular, rib, vertex features; 2 through spell plug the cuboid activities, through the abstract from the reality of the cube out of the process and found that The characteristics of cuboid surface, edge and vertex, we know that the cube is a special cuboid; 3. In the process of splitting the cuboid, we can find the key factors that affect the shape and size of the cuboid: length, width and height. 4. The method of learning the graphic graphics to migrate to the study of three-dimensional graphics in the activities, and gradually comprehend the observation, classification, comparison and other learning