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The Geometer's Sketchpad

The Geometer's Sketchpad is software for the visual learning of mathematics.  It can be used to illustrate models of fractions, geometric patterns, algebraic ratios and proportions, and other mathematical ideas.  Purdue's licensee for University-owned computers at the West Lafayette campus includes both the Windows and Macintosh versions.

A detailed description of Geometer’s Sketchpad can be found on the Key Curriculum Press website:


The Geometer’s Sketchpad is no longer being distributed.  The last purchased version was 4, copyright 2001.  Availability for this version is detailed below.



Geometer’s Sketchpad 4 is available for University-owned machines on the West Lafayette campus for use by individuals employed, enrolled, or engaged in educational programs at the West Lafayette campus only.  Newer versions of the software are not available.

This software is not available for use with personally owned machines.


Product Limitations

Due to the age of this product, Geometer’s Sketchpad 4 may not be compatible with modern versions of the Windows or Macintosh operating systems.



Purdue’s purchase of unlimited perpetual licenses for the Geometer’s Sketchpad 4 does not extend to newer versions of the product.  There is no end-user cost associated with installation and use of version 4 of this product on University-owned machines on the West Lafayetee campus.  The software must be fully uninstalled when association with the University ends or status changes results in ineligibility.

Pricing for an independant purchase of a newer versions may be found at:




Per special request, Geometer’s Sketchpad 4 can be made available via installation media on 24-hour loan.  Please e-mail itap-licensing@purdue.edu to schedule pick-up of the software.  For Purdue-owned machines administered by an IT organization such as ITaP, CLA-IT, or ECN, please contact your IT group for assistance prior to request.



ITaP Licensing offers limited support of this product, covering issues with software installation and licensing. Please send e-mail to itap-licensing@purdue.edu with details, including the exact text of any warnings received and the steps during installation or use where the issue arises.

For all other product support requests, please contact Key Curriculum directly at http://www.keycurriculum.com/support.

Due to the age of this version of the software, support cannot be guaranteed.


Contact Information

ITaP Licensing can be contacted at itap-licensing@purdue.edu Monday through Friday, 8am to 5pm. Response to inquiries will usually be one business day or less.