Asked to “fix” a false conjecture, students combine their reasoning and observations about absolute value inequalities, signed numbers, and distance to write true mathematical statements.

Contributor Notes

David A. Yopp, dyopp@uidaho.edu, is associate professor of mathematics education at the University of Idaho in Moscow. He is interested in proving, reasoning, and arguing in mathematics classrooms and mathematics coaching.

(Corresponding author is Yopp dyopp@uidaho.edu)
The Mathematics Teacher
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