As the ability to reason receives increasing attention across all grade levels, this author learns that furnishing preservice teachers with opportunities to evaluate mathematical arguments will help them recognize valid proofs in their own classrooms.

Contributor Notes

David Yopp,, is an assistant professor of mathematics education at Montana State University in Bozeman. He is interested in professional development, proof and reasoning in grades K–12, and mathematics for teaching.

(Corresponding author is Yopp
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Teaching Children Mathematics
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