Volume 93, Number 6 • September 2000
About the cover Designer cyclic peptides self-assemble into organized tubular array structures.
The view shown lookp down the tube axis (from Ghadiri, M. Reza, et al., Nature, 1993, 336, 324-27).
Graphic by M. Pique, The Scripps Research Institute;
all rights reserved
Articles
448 Discuss with Your Colleagues Why Representations?
James E. Schultz and Michael S. Waters
455 College Entrance Mathematics in the Year 2000—What Came True?
Stephen B. Maurer 462 Algebra for All
Using Homemade Algebra Tiles to Develop Algebra and Prealgebra Concepts Annette Ricks Leitze and Nancy A. Kitt
512 The Angles of a Star Alan Lipp
518 The Probability of Winning a Lotto Jackpot Twice Emeric T. Noone, Jr.
Departments
445 From the Editorial Panel 446 Reader Reflections
467 Call for Manuscripts Related to Principles and Standards 470 Classy Tips
474 Media Clips
Susanne K. Westegaard 478 Activities
Modeling Soft-Drink Packaging Gary Froelich
490 September Calendar 492 Solutions to Calendar 496 Technology Tips
Lin McMullin and Daren Starnes 504 Connecting Research to Teaching
Using Data-Collection Devices to Enhance Students' Understanding Douglas A. Lapp and Vivian Flora Cyrus
530 Publications 535 Products 536 Projects
Building Regional Capacity Nancy Antonellis
536 Mathematics Teacher Wins Again!
538 Guide to Advertisers
