In This Issue
GeoCalc
Seeing Math
TI Contests


GeoCalc
http://www.baldgeeks.com/geocalc.htm
GeoCalc is Macintosh shareware for calculating the area, perimeter, sides, angles, and other measures of two and threedimensional shapes such as ellipses, rectangles, triangles, trapeziums, parallelograms, polygons, prisms, cylinders, cones, pyramids, and spheres.
If entered values do not describe a valid geometrical figure, GeoCalc highlights the specific problem and suggests solutions. Also available in German and Norwegian.
Areas of the site includes:
 Introduction movie
 Installation
 How to use GeoCalc
 Download
 Registration
 Languages
 System Requirements
 Version History
Seeing Math
http://seeingmath.concord.org/sms_interactives.html
Seeing Math has developed interactive software Java tools to clarify key mathematical ideas in middle and high school mathematics. Each interactive provides a realtime connection between representations of the mathematics (symbolic, graphical, etc.), so that changes in one representation instantly cause changes in the other.
Current interactives include:
 Qualitative Grapher
 Piecewise Linear Grapher
 Linear Transformer
 Function Analyzer
 Quadratic Transformer
 System Solver
 Plop It!
 Proportioner
The Concord Consortium freely offers these interactives online, as well as a link to download them all for offline use.
TI Contests
http://www.84silver.com/
Texas Instruments has three different contests:
 GraphiTI Design Contest
Create your own GraphiTI design and you could win a $1,000 shopping spree and a TINavigator classroom learning system and 30 TI84 Plus Silver Edition Graphing Calculators for your school.
 Deadline: September 29, 2006 at 11:59 p.m. ET
 View the Contest Rules:
 http://www.84silver.com/contest_rules.php
 View the 2005 Winners:
 http://www.84silver.com/2005_winners.php

 Texas Instruments $8,400+ Achieve More Scholarship
 Students, parents, and educators can nominate a scholarship winner.
 Deadline: December 20, 2006
 View the Contest Rules:
 http://www.84silver.com/win_scholarship_rules.php

 Tell Us About Your Teacher Essay Contest
 In 300 words or less, tell how your teacher has helped you understand mathematics by using Texas Instruments technology in the classroom. The teacher you're nominating must approve your essay in order for it to be officially entered to win.
 Deadline: September 29, 2006
 View the Contest Rules:
 http://www.84silver.com/win_essay_rules.php


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