MHB I think this Aperiodical post is rather interesting

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    Interesting
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The discussion highlights critiques of Khan Academy's approach to math education, particularly in the context of U.S. standards. Participants express concerns about the overall quality of math education in the U.S. and find value in the insights presented in the second video of the series. The conversation also speculates on how Khan Academy might differ if it were developed in Japan, suggesting cultural influences on educational methods. The critiques emphasize the need for improvement in math teaching practices. Overall, the thread reflects a critical examination of Khan Academy's effectiveness in addressing educational shortcomings.
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I've felt for a long time that math education in the US is unacceptably bad. Some goods points in this video for sure. This is the video to which CB is referring I believe.

[video=youtube;CHoXRvGTtAQ]What if Khan Academy was made in Japan?[/video]
 

Thread 'Area of Overlapping Squares'

Here is a little puzzle from the book 100 Geometric Games by Pierre Berloquin. The side of a small square is one meter long and the side of a larger square one and a half meters long. One vertex of the large square is at the center of the small square. The side of the large square cuts two sides of the small square into one- third parts and two-thirds parts. What is the area where the squares overlap?
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