There are two clues. First, from learning to determine the position of some objects in a specific situation in a way similar to the first row, it has gradually developed to use digital pairs to determine the position; The second is from learning to describe the relative position or direction of objects with orientation words or direction words to drawing and describing simple road maps with scale. 1 1 "number pair" refers to two numbers, namely, the number of columns and the number of rows. The second indicates the first column and the first row in the number pair. Thirdly, there is a prescribed writing format and corresponding reading method for determining the position with numbers (subtitles are given in order). First, learn to describe the relative position of an object with up, down, left, right, front and back, and then learn one of the given four directions of east, south, west and north to identify the other three directions. On this basis, continue to learn four directions: northeast, northwest, southeast and southwest. The above content was learned in the first phase. In the second learning period, learn the scale. Under certain circumstances, the distance on the map and the actual distance will be converted according to the given scale. Based on the knowledge of scale, you can learn to determine the position of an object according to its direction and distance from a reference point, and learn to draw and describe a simple road map. It can be seen that the learning content contained in this clue has a higher sense of space for students and a stronger comprehensive requirement for knowledge application.