April 24, 2009
Volume 14 No. 17

In This Issue

TI-Nspire™ Tips & Tricks

Richter Scale Day

The Galileoscope™


New!Special Offer
through June 30, 2009 on Problems of the Week class, school, or district memberships when you add a PD online course!


Online PD

Moving Students from Arithmetic to Algebra

Problem Solving Strategies

The Math Forum's Problem Solving Process

PoW Class Membership: ... Effective Implementation

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


TI-Nspire™ Tips & Tricks


Marc Garneau presented tips and tricks for expanding the capabilities of the TI-Nspire at the T3 International Conference in Seattle this past March. Here is his handout from that presentation, posted on his blog in PDF format.

Richter Scale Day

April 29 is Richter Scale Day, celebrating the birthday of Charles Richter. The Richter magnitude scale is used worldwide to measure the amount of energy released during earthquakes, particularly smaller, local quakes. Charles Richter and Beno Gutenberg at the California Institute of Technology developed the logarithmic scale in 1935 to study seismic activity in California.

Algebra: In Simplest Terms

  • Program 19, "Logarithmic Functions," explains how the Richter scale measures quake magnitude
  • Program 11, "Circle and Parabola," demonstrates how P and S waves are used to locate an earthquake's epicenter

Dr. Math exchanges on the subject:

Logarithmic Scales

Measurements on a Logarithmic Scale

Why Use a Logarithmic Scale to Display Data?

The Galileoscope™


High-quality, low-cost, easy-to-assemble telescope kits developed for the International Year of Astronomy (2009) in celebration of "... the celestial wonders that Galileo Galilei first glimpsed 400 years ago and that still delight stargazers today." Free educational materials will be provided via the Web site, and teachers are encouraged to share their own resources as well.

More International Year of Astronomy sites:

National Aeronautics and Space Administration

National Optical Astronomy Observatory


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