MATH
NCTM
NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS
Articles
632 Deep Thoughts on the River Crossing Game Dan Canada and Dave Goering
6 4 0 The Power of Investigative Calculus Projects John Robert Perrin and Robert J. Quinn
647 Why Aren't They Called Probability Intervals?
Thomas F. Devlin
Departments
628 Reader Reflections 652 Mathematical Lens
Library of Celsus, Ephesus, Turkey Edited by Ron Lancaster and Brigitte Bentele 656 Delving Deeper
Heron Triangles and Moduli Spaces
Steven Rosenberg, Michael Spillane, and Daniel B. Wulf Edited by Al Cuoco and E. Paul Goldenberg
6 6 4 May Calendar
666 Solutions to Calendar
Edited by Jean McGivney-Burelle and Paul Vicinus 670 Connecting Research to Teaching
Graphing Functions: Resolving Students' Misconceptions by Using "Messy" Data and Calculator-Based Laboratory Activities Cindy Pilipczuk
Edited by Libby Knott and Thomas A. Evitts 677 Call for Manuscripts for the Seventy-third
NCTM Yearbook (2011):
Motivation and Disposition: Pathways to Learning Mathematics
677 Save Time: Submit Your Manuscripts Online 678 Technology Tips
Pivot Tables Can Turn Your Record Keeping Around Kris Green
Edited by Kathleen Lynch-Davis and Shannon Driskell 6 8 2 Activities for Students
Applying Secant Lines and Tangent Lines for the Optimal Placement of Range Lights
Michael A. Jones, Rabab Abi-Hanna, and Kenneth Krott Edited by Ruth Dover and Dot Doyle
690 Media Clips
Safe Havens, by Lawrence M. Lesser The Aral Sea
Edited by Margaret Cibes and James Greenwood 695 For Your Information
Publications; Products
697 Guide to Advertisers
698 Thanks from the Editorial Panel 700 Classified Index
Inside Call for Manuscripts: 2010 Focus Issue Back Learning and Teaching Mathematics through Cover Technology
Rivers are at the heart of two articles this month. Dan Canada and Dave Goering use elementary probability, Fathom, and the computer to play the River Crossing game, making some surprising discoveries about strategy along the way (pages 632-39). And Michael A. Jones, Rabab Abi-Hanna, and Kenneth Krott pro- vide an activity that has students aid navigation by placing range lights at optimal locations along a ser- pentine Maine river (pages 682-89). Photograph courtesy of Michael Kreindler, Range Light Keepers; all rights reserved
Vol. 101, No. 9 • May 2008 | MATHEMATICS TEACHER 6 2 7
