论文部分内容阅读
在教学数学三年级下册“公顷、平方千米”时,我设计了如下教学片断:教师精讲:边长是100米的正方形面积是1公顷,边长是1千米的正方形面积是1平方千米。因此:(用课件展示如下)1公顷=10000平方米;1平方千米=100公顷情境设计(一)实践活动(1)师:同学们小组互相合作测量教室的长、宽,要求用课前准备的测量工具,以米为单位进行测量,求出教室的面积(用课件展示)。生:各组学生积极参与,
In the third grade of teaching mathematics under the “hectare, square kilometers ”, I designed the following teaching fragment: Teachers say: Square 100 meters side length is 1 hectare, side length is 1 km square area Is 1 square kilometers. Therefore: (Show courseware as follows) 1 hectare = 10000 square meters; 1 square kilometers = 100 hectares of context design (A) practical activities (1) division: students team work together to measure the length and width of the classroom, Preparation of measurement tools, measured in meters, find the classroom area (with courseware display). Students: Each group of students actively involved,