Japanese Lesson 1
Lesson Table

CW: Whole-class work
SW: Seatwork

  
Time Description of Activity Description of Content
00:01 Pre-Lesson Activity  
00:27 CW: Working On Tasks/Situations
(59 sec) 		(Teacher shows a figure on computer screen)
The triangles between two parallel lines have the same areas.
     
    
01:26 CW: Setting Up Tasks/Situations
(2 min 39 sec) 		(Teacher draws a diagram on chalkboard)
There is Eda's land. There is Azusa's land. And these two peoples' border line is bent but we want to make it straight.
         
03:34 Try thinking about the methods of changing this shape without changing the area.
04:05 SW: Working On Tasks/Situations Individually (2 min 59 sec)  
07:04 SW: Working On Tasks/Situations in Small Groups "People who have come up with an idea for now work with Mr. Ishikawa, and people who want to discuss it with your friends, you can do so. And for now I have placed some hint cards up here so people who want to refer to those, please go ahead."
19:20 CW: Sharing Tasks/Situations
(3 min 37 sec)

First you make a triangle.
Then you draw a line parallel to the base of triangle.
Since the areas of triangles between two parallel lines are the same we can draw a line here.
[See the diagram]

 

We make a triangle and draw a line parallel to the base of the triangle by fitting it with the apex.
Since the length of the base doesn't change and the height in between the parallel lines doesn't change. So wherever you draw it the area doesn't change with the triangle that we got first.
22:57 CW: Setting Up Tasks/Situations
(42 sec)		 (Chalkboard)

23:25 Without changing the area please try making it into a triangle.
23:39 SW: Working On Tasks/Situations Individually (3 min 8 sec)  
26:47 SW: Working On Tasks/Situations In Small Groups (19 min 24 sec) "Then people who are done please go to Mr. Ishikawa again. And people who want hints I will leave hint cards here so please look at them and try doing it. It's also fine to do it with your friends." (Hint cards unidentified.)
46:11 CW: Sharing Tasks/Situations
(2 min 47 sec)		 "We will make them ABCD."
[Draw a diagonal line AC and make a triangle by drawing a parallel line going through D]

[Draw a diagonal line AC and make a triangle by drawing a parallel line going through B]

[Draw a diagonal line BD and make a triangle by drawing a parallel line going through A]

[Draw a diagonal line BD and make a triangle by drawing a parallel line going through C]
 
46:37 CW: Summarizing  
48:58
49:47		 CW: Assigning Homework
(49 sec)		 Pentagon ABCDE.
"Let's try making the pentagon into a triangle ... I'll make that then a homework."
 
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