Here is my comment on Common Core division from the thread
ATS: Critical thinking in Geometry
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Nov, 13 2010
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Something else shocking I have learned since then about public education of math in Louisiana. In long division students are no longer taught to
carry-the-remainder. They use something called clusters. For instance.
80 divided by 10
the correct answers are 7, 8, or 9.
As long as the student understands the general idea.
For precision they use a calculator.
I discovered this while helping a friend of mines' daughter do her math homework. When I tried to show her how to carry the remainder, she said
"I'll get in trouble if I do it that way." I did some checking around and found out that she was for real about this.
Clustering, not carrying the remainder.
A year later I was having lunch with her grandfather and I told him about it. He was angry at me. And I received quite a lecture. How dare I. I
didn't know what I was talking about. I was crazy.
A month later He took me to lunch and apologized. He had checked into it. It was true.
They don't even know how to divide around here any more. I guess that's not fair to say really. They know how to load a division problem into a
calculator. It would be more accurate to say, the students these days don't know how to do math accurately enough to determine if the calculator is
giving the correct answers or not.
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Most of the thread is about the purpose of Geometry, to get one ready to learn logic and what constitutes proof.
Even if a parent puts their child in a Charter school, and learns more traditional math... I have to ask. Are they teaching geometry as the
foundation of logic? I doubt it.
Mike Grouchy