| Creative String and Line Design | Challenge Boxes | Mental Math in Junior High |
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$8.50
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$12.95
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$14.95
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| Building Toothpick Bridges | Thought Provokers | Five Minute Challenges |
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$9.95
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$12.99
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$8.50
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| A Graphing Matter | Straw Polyhedra | Mathercise Book A |
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$15.95
|
$6.50
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$11.95
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