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Bill McCallum
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Bill McCallum retweeted
Illustrative Math Jun 1
We stand against racism. We stand with communities of color. We stand for a world where every child has an equal opportunity to learn mathematics.
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Bill McCallum Apr 30
More specifics are on the way.
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Bill McCallum Apr 28
Replying to @ABmathcoach
I've always been a fan of going deeper rather than faster. That is, if students have mastered the standards, have them work on harder and more interesting problems on grade level work rather than move on to the next grade level. But that's just me.
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Bill McCallum Apr 28
Replying to @DorianBohler
I think terminology can vary in textbooks from the terminology in the standards. I'm guessing regrouping refers to the whole process of decomposing and composing base ten units (10s, 100s, etc.) that is described in more detail in the standards.
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Bill McCallum Apr 27
Thoughts on the Back-to-School Problem
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Bill McCallum Mar 17
I drafted this blog post a week ago, when many large meetings had not yet been canceled. It seems a little quaint now, but the math is still interesting.
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Bill McCallum Feb 26
Slide I'm planning to use in a presentation tomorrow.
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Bill McCallum Jan 21
Great blog post on a new way of measuring cognitive complexity.
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Bill McCallum Jan 16
Replying to @robertkaplinsky
Just to be clear, I agree the question is crazy even had it been correct.
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Bill McCallum Jan 15
Replying to @robertkaplinsky
And if we can't assume the product rule is what we think then we don't have enough information to answer the question.
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Bill McCallum Jan 15
Replying to @robertkaplinsky
The complex number one is flawed because they haven't said what is given. If it is given that the product rule in C is what we think it is then all the answers are correct because we know C is a field, and any implication with a true consequent is true, whatever the antecedent.
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Bill McCallum Jan 11
Looks like that got cut off, I meant
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Bill McCallum Jan 11
Elham, thanks for pointing this out. We recently moved the tasks to another server and it appears there are some bugs. While we are working on a fix, try inserting /content-standards/ in the url, as in
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Bill McCallum Sep 26
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Bill McCallum Sep 7
Cricket Dundee.
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Bill McCallum Sep 7
I have an Akubra hat and one of those telescoping portable umbrellas. Maybe that will do?
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Bill McCallum Sep 7
Replying to @k8nowak @TracyZager
I've never thought of myself as a Jiminy Cricket before but I like it. Now I have to get a top hat and an umbrella.
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Bill McCallum Sep 4
Replying to @ddmeyer @k8nowak
You're welcome.
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Bill McCallum Sep 4
Replying to @k8nowak
Right, but they don't add. So .2 is introducing the first idea you need to add them, but only the first idea, and .5 is adding them, but only in the simplest case. Getting ready for the big game in grade 5.
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Bill McCallum Sep 4
Replying to @k8nowak
I'm glad you like it. A light sip of unlike denominators.
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