Here’s the idea for this site:
Teachers need to be able to quickly look at mathematical work and identify the assumptions behind the work, and what actions to take in response to the work. That’s hard. But practice can help us get better at this.
The idea is that on this site each post will be a selection of student work. That student work will be posted by me, but sent in by you. And then in the comments we’ll discuss: what are the assumptions behind this work, and what could the next steps be.
To submit to the site, email me at mathmistakes@gmail.com.
Also, we tag everything, so check out the bottom of the page for the labels. In a year we’ll have amassed and tagged hundreds of math mistakes, so this site will become a valuable resource for planning lessons.
Enjoy! Be in touch if you have any comments or suggestions.
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This is such a cool idea! I’m going to share it with my colleagues!
I am actually thinking about using this with students and see if they can spot the error. This would be a wonderful learning tool to have practice with explaining their answer; deciding if an answer is reasonable or not as well as developing their critical thinking skills.
It would help if each submission specified the grade in which each problem has been given.
This is a nice site. I’m going to add it to my blogroll.