Math Forum Internet News

Volume 9, Number 18

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3 May 2004                                    Vol. 9, No. 18

                  THE MATH FORUM INTERNET NEWS

       Sketchpad Activities for Young Learners: Grades 3-5
             David Bailey's World of Tessellations
              Statistics Every Writer Should Know


       SKETCHPAD ACTIVITIES FOR YOUNG LEARNERS: GRADES 3-5

      http://www.keypress.com/sketchpad/syl/activities.html

  This collection of activities by Nathalie Sinclair and her
  colleagues offers examples of the ways in which Geometer's
  Sketchpad can be used across the range of mathematical
  subject areas in the elementary curriculum.

  Read about the activities, download individual sketches or
  use the link to download the entire collection of sketches,
  handouts, and teacher notes. These sketches require
  Sketchpad 4.0 or later:

    - Grouping I and II
    - Jump Along
    - Measuring Fish
    - Balance
    - Circles and Squares
    - Ghost Paths
    - RooBooGoo
    - Making a Kaleidoscope
    - Similarity
    - Stretching Ruler
    - Curved Path
    - Coordinate Geometry
    - Color by Numbers

  Introduction
  http://www.keypress.com/sketchpad/syl/index.html

  Geometer's Sketchpad
  http://www.keypress.com/sketchpad/

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            DAVID BAILEY'S WORLD OF TESSELLATIONS

                http://www.tess-elation.co.uk

  The tessellations created by David Bailey are of a
  "representational" nature, as exemplified by M.C. Escher.

    - Birds (1)
    - Birds (2)
    - Birds (3)
    - Fish (1)
    - Fish (2)
    - Birds and Fish
    - Dimorphic
    - Counterchange
    - Parquet Deformations

  Bailey discusses tessellating polyhedra and Johannes Kepler's
  contribution to the study of tessellations. He also describes
  his own design process, and offers recommended links and
  references.

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                   TESSELLATION TUTORIALS

      http://mathforum.org/sum95/suzanne/tess.intro.html

  A series of tutorials by Suzanne Alejandre that demonstrate
  how to tessellate using HyperCard for black and white and/or
  HyperStudio for color, ClarisWorks, LogoWriter, templates, or
  simple straightedge and compass. The tessellation lessons
  include units incorporating rotations and glide reflections,
  a section called "Where's the Math?" that elaborates on some
  underlying geometric principles, comments contributed by
  others, and samples of student work.

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             STATISTICS EVERY WRITER SHOULD KNOW

              http://www.robertniles.com/stats/

  Robert Niles writes, "Numbers can't 'talk,' but they can tell
  you as much as your human sources can. But just like human
  sources, you have to ask!" On his site he describes some
  of these basic concepts in statistics:

    - Mean
    - Median
    - Percent
    - Per capita and Rates
    - Standard Deviation and Normal Distribution
    - Margin of Error and Confidence Interval
    - Data Analysis
    - Sample Sizes
    - Finding Data on the Internet
    - Statistical Tests
    
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