Research explores how to help students build from, instead of building with, examples when justifying mathematical ideas.
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Informing Practice: Examples as Tools for Constructing Justifications
research matters for teachers
Kristen N. Bieda and Jerilynn Lepak
Math for Real: Packaging Golf Balls
“when will I ever use this?”
Randy Hall
A package of three golf balls provides the real-world scenario for this ratio and area activity.