NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS
Articles
167 Ecosystem Simulations and Chaos on the Graphing Calculator Robb Sinn
185 Who Will Win? Predicting the Presidential Election Using Linear Regression
John H. Lamb
193 Creating and Exploring Simple Models Miles J. Hubbard
205 Redefining a Model Thomas E. Hodges
209 Using a Before-During-After (BDA) Model to Plan Effective Secondary Mathematics Lessons
Jane Murphy Wilburne and Winnie Peterson
The California condor, a majestic bird with a wingspan of up to 9.5 feet, is one of the world's most endangered species. In the 1980s, the population of this very social raptor declined to about twenty-five birds. A captive breeding program was established, and in 1992 the first captive-bred condors were reintroduced into the wild.
In "Ecosystem Simulations and Chaos on the Graphing Calculator," Robb Sinn extends an ecosystem unit in his classroom to the study of endangered species such as the condor. Some of the mathematics Sinn uses with his algebra students includes working with parameters, pattern seeking, home screen iteration on the calcula- tor, and linear, quadratic, cubic, and logistic functions.
James Steidl/iStockphoto.com; all rights reserved.
Departments
164 Reader Reflections 176 Media Clips
Edited by Margaret Cibes and James Greenwood 179 Mathematical Lens
Arches at King Fahd University of Petroleum and Minerals, Saudi Arabia
Peter Taylor
Edited by Ron Lancaster and Brigitte Bentele 2 0 0 October Calendar
202 Solutions to Calendar 214 Activities for Students
Exploring the United Nations' Human Development Index
Kay B. Somers
Edited by Susan Beseler and Ruth Dover 225 Technology Tips
Orstat-2000: Educational Software for Probability and Optimization
Henk Tijms
Edited by Robin Rider and Kathleen Lynch-Davis 229 Delving Deeper
The Jug Problem Reloaded Stan Yoshinobu and John Wilkins
Edited by Al Cuoco and E. Paul Goldenberg 233 Connecting Research to Teaching
Quadratic Functions: Students' Graphic and Analytic Representations
Ali Eraslan and Leslie Aspinwall
Edited by Libby Knott and Thomas A. Evitts 238 For Your Information
Publications, Products 240 Guide to Advertisers
Vol. 101, No. 3 • October 2007 | MATHEMATICS TEACHER 163
