In 1995 a third version broadened the scope of the program from Euclidean and transformational geometry to include analytic geometry.
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Scott Steketee joined the development team, and with the support of IBM's EduQuest division, Key produced a version of Sketchpad for Microsoft Windows in 1993. Since this beginning almost twenty years ago, continual development and improvement has kept The Geometer's Sketchpad at the forefront of educational technology innovation in school mathematics. After several years of development in the academic setting, Sketchpad underwent a year-long field-test in schools across the United States, and in 1991, the first commercial Macintosh version was released by Key Curriculum Press. Rasmussen and Jackiw invented the term "Dynamic Geometry" to describe Sketchpad's fundamentally-interactive geometric imagery. Key's founder and CEO, Steven Rasmussen, was the first to see that Jackiw's technique for interactively manipulating mathematical diagrams while maintaining their fundamental definitions had broad educational potential as a tool for mathematical visualization, generalization, conjecturing, and problem-solving. Key Curriculum Press became involved as the project's publisher. The program's name honors Ivan Sutherland's 1963 SKETCHPAD program, a groundbreaking early work in interactive computer graphics (Sutherland, 1963). Under its umbrella, Nicholas Jackiw pioneered the development of the first version of The Geometer's Sketchpad. This project, funded by the National Science Foundation, aimed to develop new technology-based materials for use in the teaching of geometry. The origins of The Geometer's Sketchpad date back to the 1980s and to the Visual Geometry Project, a research project at Swarthmore College under the direction of Drs.
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