Math Mistakes and Error Analysis: Diamonds in the Rough
Andrew Stadel
Estimation180.com/tmc15
Thursday 2:45-3:45
TMC15
Claremont, CA
We need a large window into student thinking.
Turn problems into play by pointing out that making predictions means everyone will be wrong. Who's going to be the least wrong?
Imagine the anxiety you feel when the copier isn't working. How do we clear that jam with our students?
How can we make student mistakes drive instruction, curb student misconceptions, and strengthen formative assessments?
Polygraph by Desmos for teachers; use teacher dashboard to analyze student data. Why did it go well? Why did everyone miss this one? Give students a cheat sheet of vocab words to support them.
Andrew Stadel's Survey: Goo.gl/fOdZKQ
Start teaching exponents by giving eight problems that aren't incorrect and asking students what the answers should be.
Research shows that trying something and then learning about your mistakes increases retention.
We don't need textbooks to give us mistakes, we have students for that.
We can use WWDB to improve students ability to see things that are out of place.
Pause and predict- if we know we're looking for errors, pause and predict what 'should' come next so students aren't just passively watching a video.
What are some other concepts we can teach through error analysis?
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