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MATH TOOLS NEWSLETTER - AUGUST 5, 2006 - No. 42

(Crownsville, Maryland) and a Tool Fest '04 participant,
shares these PowerPoint files that he has developed and
used with his students.

A Geometric Proof of the Pythagorean Theorem
http://mathforum.org/mathtools/tool/25463/

Exponents
http://mathforum.org/mathtools/tool/25389/

Math Jeopardy Template
http://mathforum.org/mathtools/tool/25388/

Variables and Unknowns
http://mathforum.org/mathtools/tool/25405/

rate Don's or other resources, comment on them, review
them -- or start a new discussion!

***FEATURED TOOL
Tool: Classic Chembalancer
Sulan Dun
http://mathforum.org/mathtools/tool/24454/
Classic Chembalancer is an online game that teaches
balancing chemical equations by inspection. Students
type coefficients in front of each molecule and the
computer draws the corresponding number of molecules
so students can make the elements or groups of elements
match -- a logic similar to the kind exercised in
simplifying algebraic polynomials.

***FEATURED TOOL
Tool: Jeff's Utilities: Simple Conversions at your Fingertips
Jeff Napier
http://mathforum.org/mathtools/tool/24611/
Simple conversion utilities for such measures as lengths,
areas, volumes, liquid measures, weights, time, speed,
temperature, money, bytes, Roman numerals, and more.

***FEATURED TOOL
Tool: Chaos In the Classroom - Visualizing the Logistic Equation
Ben Weintraub
http://mathforum.org/mathtools/tool/24771/
The logistic equation is a simple dynamical system that
illustrates very nicely the emergence of complex chaotic
behavior from a single, simple equation. This lesson plan
is targeted towards high school students with a good grasp
on the concepts of functions and graphing, and could serve
as an entry-point into a larger unit on chaos theory and
chaotic systems.

***FEATURED TOOL
Tool: K3DSurf for 3D Mathematic Drawing
Abderrahman Taha
http://mathforum.org/mathtools/tool/24805/
K3DSurf is a program to visualize and manipulate
mathematical models in three, four, five and six dimensions.

***FEATURED TOOL
Tool: MathsNet: A Level Pure C2 Module
Mathsnet
http://mathforum.org/mathtools/tool/25071/
Solving sine equations. This shows a sine curve that can
be manipulated and a horizontal red bar that moves up and
down. Students are given equations to solve, like
sin x = -.5. They graph sin x and then put the red bar
at -.5 and find how many solutions there are in the given
range. No feedback is given, so students won't know if they

***FEATURED TOOL
Tool: Absolute Value Problems
Larry Green
http://mathforum.org/mathtools/tool/25086/
Students are given an absolute value equation, and then given
boxes to fill in step by step. After each step is complete,
there is feedback, with help if the answer is wrong. This
continues until the problem is complete. Very good for self
checking concepts of solving absolute value equations.

***FEATURED DISCUSSION
Reflections on Graphing Math Tools
Swannee explains, "I feel this is much easier to use and
to instruct than using the graphing calculator. How can
we record the different data and save it to a table?"

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