I Tried Teaching Math Using "That Guy" (lol) — A Math Class That Starts with Students' Own Words

"What is a prime number?"During a math class one day, I asked the students this question. Then, one student answered."A number that can't be divided by anything other than 1 and that guy!"……That guy!?
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Setting Up the Conditions for Productive Math Conversations

When elementary students learn some tools for discussing math, they can start to see it as more than just quickly getting to ...