Math Arguments
Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.
What Could the Missing Element Be?
A well-made WODB needs four elements. Each element must have some characteristic that makes it different from the other three. What could the missing elements be?
Which One Doesn't Belong?
For what reason can each item be considered the "One That Doesn't Belong"?
"Which One Doesn't Belong?" are thought-provoking puzzles designed to sharpen skills in analysis, argument and divergent thinking.
Created by Christopher Danielson and collected in his book, Which One Doesn't Belong - A Shapes Book, WODB sets help students improve their understanding of math by requiring specific and clear language when delineating how each item differs from the others. A very large number of these have been collected at WODB, curated by Mary Bourassa.
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