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

  Don Link, a sixth grade math teacher at Indian Creek School
  (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


    Math Jeopardy Template

    Variables and Unknowns

  Download and try Don's files. Please take a moment to
  rate Don's or other resources, comment on them, review
  them -- or start a new discussion!

  Tool: Classic Chembalancer
  Sulan Dun
  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.

  Tool: Jeff's Utilities: Simple Conversions at your Fingertips
  Jeff Napier
  Simple conversion utilities for such measures as lengths,
  areas, volumes, liquid measures, weights, time, speed,
  temperature, money, bytes, Roman numerals, and more.

  Tool: Chaos In the Classroom - Visualizing the Logistic Equation
  Ben Weintraub
  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.

  Tool: K3DSurf for 3D Mathematic Drawing
  Abderrahman Taha
  K3DSurf is a program to visualize and manipulate
  mathematical models in three, four, five and six dimensions.

  Tool: MathsNet: A Level Pure C2 Module
  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
  have the right answer.

  Tool: Absolute Value Problems
  Larry Green
  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.

  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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             The Math Forum @ Drexel -- 5 August 2006