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Powers Puzzler

What is going through this student's brain? What would you say to the kid to help out? Let me know if you're having trouble reading today's submission. If image quality continues to be a problem then...

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What does he think "factoring" means?

What does this kid think "factoring" means? And, at least to me, the more interesting question is: where did that conception of "factoring" come from? Tease it out in the comments. Permalink

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Quadratics Quiz

As we start a new week of Math Mistakes, if you have any pictures of student work that you find interesting in any way, please send it in.    Today's student has a couple of ideas worth drawing out....

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Explanations of Slope from 9th Graders

Today's submitter asked the following question:  Here are a selection of student responses: Slope is how far apart the two points are. You can use the idea of rise over run. You rise a certain amount...

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"Graph x = 3"

The mistake is pretty easy. But what's the underlying misconception? Permalink

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