周长与面积教学反思(国外英文资料).docVIP

周长与面积教学反思(国外英文资料) Own collection Think its useful So upload it to Baidu Share it with everyone! Reflection on Teaching of girth and area [Scene 1]: Teacher: there is a wire in the teachers hand See what you can do Student: it can be surrounded by a rectangle T: this wire is 24 centimeters long If its for you How do you plan to stay? Can you shape a rectangle with several shapes? Student: first half T: fold the wire in half What is this? he asked Student: one length plus one width Teacher: continue to fold Fold the two lengths of the rectangle and one width How do you discount it? He motioned for him to fold the long side again Its just a rectangle The division continues to demonstrate Also got a rectangle) the teacher asked: these shapes are different rectangles. What will the area be like? Sheng 1: they are the same circumference The area is not the same Student 2: the area should be the same size Sheng 3: no matter how Wai Same perimeter The area is equal T: now there are two different points of view A rectangle with equal sides on the blackboard The area is equal Its just our guess Is that right? Try to verify it What method do you have to validate? Talk about it in a group [reflection] this is the introduction of the new lesson Very simple But savor it Its not that simple The wire from the teachers hand Consider the possibilities of enclosing a rectangle Which leads students to guess the rectangle with equal perimeter What will the area be like? The teacher provides effective stimulants Arouse students cognitive conflict This is the beginning of wisdom [scene two]: T: now, please exchange views How did you draw the rectangle on the grid paper? Student 1: I drew three rectangles The length and width are 10 cm and 2 cm, respectively 8 cm and 4 cm 7 cm and 5 cm (produce pictures) I got the conclusion that the rectangle with equal perimeter Unequal area Teacher: (length and width of blackboard writing) look at the rectangle drawn by the student Is it the same recta