论文部分内容阅读
精彩片段一:师:同学们,这个信封里面藏着很多平面图形,到底是什么图形呢?猜一猜,并说明你猜测的理由。(教师边说边从信封里拉出了长方形的一小部分。)生1:我认为这是一个长方形。因为我看到了两个直角。生2:我认为它有可能是一个正方形,因为正方形也有这样的两个直角。生3:我认为它有可能是一个直角梯形。因为直角梯形也有这样的两个直角。师:请继续往下看。(老师从信封里拉出了长方形的大部分。)生1:只能是长方形了。因为正方形四边条都相等。直角梯形是那个样子。(因为没有学习过梯形,所以这个学生只是凭借自己的经验边说边用手比划
Wonderful Fragment 1: Teacher: Classmates, this envelope contains a lot of graphic graphics, in the end what is the picture? Guess, and explain your reasoning. (The teacher said while pulling out a small portion of the rectangle from the envelope.) Student 1: I think it’s a rectangle. Because I saw two right angles. Health 2: I think it may be a square, because the square also has such two right angles. Student 3: I think it may be a right trapezoid. Because right-angle trapezoids also have such two right angles. Teacher: Please continue to look down. (The teacher pulls most of the rectangle out of the envelope.) Student 1: Only a rectangle. Because the square four sides are equal. Right angle trapezoid that look. (Because I did not learn trapezoid, so this student just by his own experience that hand gestures