二年级数学下册 平移和旋转一课一练1 苏教版（Second grade math book translation and rotation 1）.doc

二年级数学下册 平移和旋转一课一练1 苏教版（Second grade math book translation and rotation 1） Translation and rotation The teaching content The third grade (lower volumes), pp. 24-26. The teaching goal 1. To make students understanding the phenomenon of translation and rotation objects in real life, able to correctly judge simple graphics direction and distance of translation on graph paper, preliminary build relationship and change the appearance of the location of the graphics. 2. Through observation, operation and other activities, the students can draw a simple graph on the grid paper with the horizontal direction and the vertical direction. 3. Make students feel the close connection between mathematics and life, and realize that using mathematical knowledge can solve the simple practical problems in life. The teaching process First, create a situation, initial perception 1. Introduction of conversation. Talk: (show pictures of suzhou park) what is this place? There are lots of fun rides in there. Want to see it? Now lets go and see how some of these things move. Video: a dynamic picture of the amusement projects of small and medium trains, cable cars and frog hops in suzhou park. Talk: (presenting four static images at the same time) do these kinds of rides work the same way? How do they move? Please use hand gestures to draw pictures. Students use gestures to show how things move. Conversation: can you categorize them according to the way you move? Lets discuss it in the group. Talkback: how did you score? Why are you doing this? (reasons for classification and classification of students) 2. Reveal the subject. Explanation: like the cable car, the small train and the frog jump three amusement projects, all along the straight line movement, we call such a way of movement as translation (blackboard: translation); Like the funicular sport, the motion is called rotation (board book: rotation). Today were going to study translation and rotation. Practice it. So lets see if we can do p