圆的认识教案(国外英文资料).docVIP

圆的认识教案(国外英文资料) Circle of knowledge lesson plans,.Txt people never know who inadvertently told you goodbye, then really gone. How long is a minute? It depends on whether you are squatting in the toilet or waiting outside the toilet...... Understanding of the circle Lecture class: grade six subject: Mathematics Topic name: understanding of circle Teaching target 1. make the students know the circle and know the names of each part of the circle 2. make students master the characteristics of the circle, understand and grasp the relation between the radius and the diameter in the same circle 3., learn how to draw round with compasses, and train students ability of drawing 4. train students ability of observation, analysis and generalization Teaching emphasis Understand and grasp the characteristics of a circle, and learn how to draw it with compasses Teaching difficulties Understand the concept of a circle and sum up the features of a circle teaching process I. foreshadowing (1) using PPT courseware to display pictures; 1. teacher questions: what are these in pictures and what are their common characteristics?. 2. questions: what are these flat patterns called? What are they different from the circle?. 3. conclusion: the circle is a curve figure on the plane, then ask: what kind of curve and figure in the end can be called circle? 4. a line segment OA revolves around one end of it for a week, leaving the track as a circle. 5. think about it, how can you draw a circle? Lets cut out the circle of the picture. (two) demonstration 1., the students took out the cut of the circle. 2., through specific operations, to understand the various parts of the name of the circle and the characteristics of the circle (1) fold the circle first, open it, change the direction, fold it again, and open it again...... Fold it several times Teacher: how many times did you find out? (there are many creases in the circle) Take a closer look. Where do these creases always meet in circles? (cente