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Patterns in the Sand: Mathematical Exploration of Chladni Patterns
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A Note on Knights, Knaves, and Truth Tables
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The Kaprekar Routine and Other Digit Games for Undergraduate Exploration
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Teaching about Scientific Inquiry and the Nature of Science: Toward a More Complete View of Science

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The Thayer Method: Student Active Learning with Positive Results
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A Simple Anharmonic Oscillator
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Understanding of the Mole Concept Achieved by Students in a Constructivist General Chemistry Course
C. Utria-Echevarria and M. Bravo

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Geometry and Mathematics Through Bridge Building
J. Joyner

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An Investigative Approach to Teaching Mathematics: Excitement and Concerns of K-8 Preservice Teachers
J. L. M. Wilkins

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A Lesson Plan with an Arc Midpoint
G. V. Akulov and O. G. Akulov