用偏向和距离描述物体的位置(国外英文资料).docVIP

用方向和距离描述物体的位置(国外英文资料) location -- describe the objects position in the direction and distance Teaching content: textbook 501-51 page example 1 and practice a practice, practice 91-3. Teaching goal: To make the students understand the meaning of north by east (west) and south by east (west) in the concrete situation, they will determine the scientific nature of the position of the object in the direction and distance. 2, lets the student experience with direction and distance to describe the object location method of exploration process, further training observation ability, ability to read and methodically expression ability, the development of space concept. Let students experience the close relationship between mathematics and life further, and enhance the awareness of daily life phenomena and daily life problems in mathematics. Focus: describe the position of the object with direction and distance. Teaching difficulties: understand the meaning of north by east (west) and south by east (west). The teaching process: One, review the direction, bridge the road Conversation: show the compass What effect does a compass have? (helping us to define direction) (board book: direction) Question: what have we learned? (courseware) ? Today we continue to learn how to describe the position of objects. (panel topic: determining location) Second, create a situation, explore new knowledge The learning USES direction to describe the position of the object A scenario diagram for example 1 Conversation: this is a picture of a ship sailing in the sea. What information do you know from the picture? A: the lighthouse 1 and the lighthouse 2 are all on the north side of the ship Lighthouse 1 is about the northeast of the ship. Lighthouse 2 is about the northwest direction of the ship N for the positive north The lighthouse 1 and the lighthouse 2 one in the northeast direction, one in the northwest direction, all deviated from the direction of the north, but the Angle of departure is dif