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        MATH TOOLS NEWSLETTER - JANUARY 4, 2008 - No. 59

  Using Technology and Problem Solving to Build
    Algebraic Reasoning
  The Math Forum has been hosting a series of online workshops
  for teachers who work with students in 5th through 9th grade.
  Teachers are exploring how technology can help students build
  algebraic reasoning as they model and solve contextualized
  problems using a variety of representations, including graphs,
  tables, equations, and words.

  Each participant's $100 workshop fee is being covered by a
  National Science Foundation (NSF) grant, affording participants
  the convenience of anytime, anywhere online learning.

  The next workshop will be offered January 14 - February 23.
  Certificates of completion will be available for participants
  finishing the six weeks of interaction. For an overview with
  additional detalis, visit:

  Deadline for applications is Monday, January 7, 2008.


  As you browse the catalog, please take a moment to rate a
  resource, comment on it, review it -- or start a new

  TI-PoW: Chirp! Chirp!
  Annie Fetter, Heidi Rudolph
  Use your TI-Nspire to find the temperature when a cricket
  chirps a certain number of times a minute.

  TI-PoW: Sam and Teri's Bank Accounts
  Terry Trotter, Steve Weimar, and Heidi Rudolph
  Use your TI-Nspire to consider this scenario and question:
  Sam and Teri have bank accounts. Sam always withdraws money;
  Teri always saves it. When will they have equal balances --
  or will they ever?

  Tool: Volume Inside a Cube - Math Open Reference
  John Page
  An interactive applet and associated web page that demonstrate
  the volume of a cube. A cube is shown where the edge length can
  be changed by dragging. The volume is continuously recalculated
  as you drag, and a unit cube grid is superimposed on the cube
  to illustrate the volume graphically. The calculations can be
  turned off for class discussion.

  Tool: Rational Equations Visualizer
  Dennis Sullivan
  Explore how the parameters in a rational equation affect the
  graph of the equation. Dynamically change the parameters and
  immediately see how the graph changes. Undefined points are
  clearly visible. Try to change the parameters so the graph of
  the equation matches a given graph.

  Tool: - 3D Graphs Online
  Denis Kozyr is a service for drawing the graphs of all kinds
  of functions.

  Resource Suggestions for Sketchpad
  JimS writes, "I would appreciate any suggestions of sources
  for Sketchpad lessons that incorporate a Smartboard."

  kristinams explains, "I am trying to integrate some new technology
  into my classroom, I teach HS Algebra. I would like to start a
  blog or have students create math videos that I could post on a
  webpage. Has anyone done a project like this?"

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                The Math Forum @ Drexel -- 4 January 2008