January 30, 2009
Volume 14 No. 5

In This Issue

Applications Open for Online Workshops

Free Mentoring Opportunities


Paper Models of Polyhedra


Online PD

Teaching Math with the Problems of the Week


Free Online

For teachers of students in grades 5-9:
Using Technology and Problem Solving to Build Algebraic Reasoning

Technology Tools for Thinking and Reasoning about Probability


Applications Open for Online Workshops

These Math Forum workshops will be held March 2 - April 13. The workshop fee is currently paid for by a National Science Foundation (NSF) grant.

Register now for:

Free Mentoring Opportunities


Mentor groups will be providing feedback to submitters in Problems of the Week over the next several weeks:

  • Math Fundamentals from February 23 - March 8
  • Pre-Algebra from February 16 - March 1
  • Algebra from February 9 - 22 and February 23 - March 8

Please have your students submit solutions. If they receive replies from a mentor, we hope you'll encourage them to revise. Not only will your students learn more, but the mentors will learn as well!

How to Use Free Mentoring


Help your students make the most of the mentoring experience.

Trial Class Account


Free 21 day access to Current Problems of the Week and the Problems of the Week Library.



BrainCake is one of many programs at the Girls, Math & Science Partnership, a program of Carnegie Science Center. BrainCake is meant to reach middle-school-age girls world-wide who are interested in changing the world with math and science.

The site includes resources, activities, discussions, and summer programs for girls, as well as blogs and resources to help parents and teachers spark and keep girls' interest in the disciplines of science and mathematics.

Paper Models of Polyhedra


Gijs Korthals Altes offers these free models of polyhedra: print them on heavy paper, fold as instructed, and glue some edges. Some models are decorated, or have colored faces (if you have a color printer). The site is also available in Spanish and Chinese.

Construction tips:


Models include:

  • Platonic Solids
  • Archimedean Solids
  • Kepler-Poinsot Polyhedra
  • Other Uniform Polyhedra
  • Compounds
  • Pyramids
  • Other Polyhedra
  • Prisms and Antiprisms
  • Kaleidocycles
  • Other Paper Models


This newsletter is provided as a service of The Math Forum, an online educational community for mathematics hosted by Drexel University, Philadelphia, PA.

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