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September 2010, Volume 104, Issue 2

FEATURES

Chocolate Key Cryptography
Dale J. Bachman, Ezra A. Brown and Anderson H. Norton
This colorful illustration of a primary component of modern cryptography—the Diffie-Hellman key exchange—draws students into the secret world of message encoding and decoding.

Historical Reflections on Teaching Trigonometry
David M. Bressoud
Returning to the beginnings of trigonometry—the circle—has implications for how we teach it.

Full description of the problems and solutions presented by Hipparchus
Full description of the problems and solutions presented by Euclid
Full description of the problems and solutions presented by Ptolemy

Integrating Literature: A Novel Idea!
Theoni Soublis Smyth and Brandie Waid
Reading literature in mathematics classrooms helps students better comprehend word problems, expand their mathematical vocabulary, and hone their critical thinking skills.

Students’ Investigation of a View Tube
Samuel Obara
Using multiple representations and technology, students explore the relationship between tube length and field of vision.

View-Tube Analysis: An Illuminations Activity

Seeing the Potential in Students’ Questions
Laurie O. Cavey and W. Ted Mahavier
Rich mathematical questions emerge from online dialogues between high school algebra students and prospective teachers.

Mathematics of Information Processing and the Internet
Eric W. Hart
Access, security, accuracy, and efficiency—all twenty-first-century high school mathematics curricula should contain content relating to these four fundamental themes.