认识面积(国外英文资料).docVIP

认识面积(国外英文资料) Collected by oneself Mistakes are unavoidable For reference only In case of error Please correct me! Thanks What is the area? Teaching contents: first class of the third grade mathematics bjnu edition volume fourth unit area 39-41 page Teaching target: 1. the process of abstracting the size of an objects surface or closed figure into an area Understand and establish the concept of area Will compare the size of the area 2. compare the size of the area The process of experiencing observation, comparison, and hands-on verification Be aware of the need for unified standards and cultivate the students spatial concept 3., the initial knowledge of the area of knowledge to solve some practical problems Realize the practical value of Mathematics 4. take an active part in the learning process Experience the joy of learning success Increase confidence in learning math well Teaching emphasis: understanding the meaning of area Teaching difficulty: the forming process of area concept Students are aware of the size of the area by a uniform standard Teaching aids: computer courseware, projectors, paste board Prepare the school bag (built in two rectangular, two square, scissors, 10 dimes, 10 cubes, a transparent paper), a watercolor pen Teaching process: Creating situations Create an area concept 1. feel the surface size The teacher often plays games with his son on foot You see This is the teachers footprints What about this one? Its the teachers sons footprint See Whats the difference between the two prints? (one by one, footprints) Yes. Just now, the students are not only out of the footprints It is smaller than the size and area of the footprint The length of footprints is like this (demo data) What exactly is the size of that footprint? (first) can you show it by hand? (Demo) yes This is the size of each of the two footprints In fact, we are in the size of the two faces What do they mean by their area? (let the students talk freely) in this class, we come to know