Can free and open source software compete with commercial applications? The short answer is, "Of course!" Obvious examples include OpenOffice, various Linux distros, and the GIMP. However, does this ...

Emeryville, Calif. (Nov. 16, 2009) – With the release of The Geometer’s Sketchpad® Version 5 for download and purchase, Key Curriculum Press® publisher Steve Rasmussen has set out on an international ...

The authors investigated the effects of student spatial ability, as measured by Raven's Progressive Colored Matrices (J. C. Raven, 1938) and type of instructional program on geometry achievement.