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      MATH TOOLS NEWSLETTER - FEBRUARY 3, 2007 - No. 48

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

  ***FEATURED TOOL
  Thinking Blocks - Ratio Word Problems
  Colleen King
  http://mathforum.org/mathtools/tool/29180/
  Thinking Blocks teaches students in grades 4 - 6 how to
  model and solve multistep word problems dealing with ratio 
  and proportion.

  ***FEATURED TOOL
  Construct a 45 degree angle with compass and straightedge
  Math Open Reference - John Page
  http://mathforum.org/mathtools/tool/28935/
  An interactive applet and associated web page that show 
  how to construct a 45 degree angle with a compass and 
  straightedge. The animation can be single-stepped or run 
  as a continuous movie.

  ***FEATURED ACTIVITY
  Worksheet - Perpendicular Line Bisector
  Math Open Reference - John Page
  http://mathforum.org/mathtools/activity/28857/
  A printable worksheet with 3 related problems to practice 
  how to bisect a line using only a compass and straightedge. 
  Suitable for class handout or homework.

  ***FEATURED DISCUSSION
  How to disconnect a piecewise graph
  http://mathforum.org/mathtools/discuss.html?&do=m&thread=pc__dd_tool__g-1
  Betty14 asks, "How should I format the graph calculator 
  (TI-83/83+/84+) in order to obtain a disconnected graph 
  instead of getting a connecting graph throughout the 
  domain of the function?"

  ***FEATURED DISCUSSION
  Advantages of Interactive Graphs
  http://mathforum.org/mathtools/discuss.html?&do=m&thread=___disc_13171_g-9
  Aldana thinks out loud that "... presenting an interactive 
  graph of two lines that represent displacement of two 
  objects (runner) as time changes will open ... discussion 
  and ... presentation of the following topics...."

  ***FEATURED DISCUSSION
  Linear Lasers/Using Math Tools
  http://mathforum.org/mathtools/discuss.html?&do=m&thread=a__h_tool__g-4
  TAR states, "I know you can tell if they cost money, but 
  wonder if there is a way to alert browsers that registration 
  is required. Because of the volume of sites, I began looking 
  at the ones that had been rated."

                     CHECK OUT THE MATH TOOLS SITE:

         Math Tools  http://mathforum.org/mathtools/
           Register  http://mathforum.org/mathtools/register.html
        Discussions  http://mathforum.org/mathtools/discuss.html
      Research Area  http://mathforum.org/mathtools/research/
    Developers Area  http://mathforum.org/mathtools/developers/
 Newsletter Archive  http://mathforum.org/mathtools/newsletter/

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            The Math Forum @ Drexel -- 3 February 2007