《肯定位置》(国外英文资料).doc

《确定位置》(国外英文资料) The third national primary and secondary schools teaching Internet search teaching design School: taoyuan center primary school in zhenjiang city, jiangsu province Name: gao cixin I. teaching case background Facing students: the square root of elementary school Subject: sixth-grade math in primary school Class: lesson 1 Prepare before class: (1) the network computer room The direct ruler, the protractor Two, the teaching topic: To determine the location Third, the textbook analysis This unit should determine the location of the object from the direction and the distance, and the teaching new method is based on the knowledge of the present direction. Contact the existing direction experience, apply the measure Angle method, and the knowledge of scale, further understand the direction, experience distance, develop space concept. In this lesson is according to the standard requirement, the increase in the elementary school mathematics teaching content, to determine the location of the knowledge, skills, more involved, the teaching has the certain difficulty. Case 1 with 30 ° direction, 6000 meters north by east said lighthouse 1 relative to the location of the ship. The 30 ° north by east describes the lighthouse in one direction, north east concept is a new direction, six kilometers beacon is about 1 the distance from the ship. The definite position of the example teaching is the compound concept of direction and distance, which can be divided into four steps for teaching. The first step to present a ship sailing due north direction of situation, let the students see the beacon of figure 1 in the northeast of the steamer, the lighthouse 2 in the northwest of the steamer, activate the direction of the existing experience. The second step is north by east and north by west. The east, south, west, and north, four main directions of life, and four auxiliary directions of northeast, southeast, northwest and southwest. In addition to the use of zhengdong, zh