High school mathematics teachers' discernment of invariant properties in a dynamic geometry environment
PDF) “Area Without Numbers”: Using Touchscreen Dynamic Geometry to Reason About Shape
Download Original Skethcpad - Colaboratory
Geometer'S Sketchpad 5 Download - Colaboratory
Geometer'S Sketchpad 5 Download - Colaboratory
Algebra - The Geometer's Sketchpad Learning Center
NCTM 2004 - The Geometer's Sketchpad Resource Center
The Geometer's Sketchpad
The Geometer's Sketchpad® (Software)
Sketchpad Explorer for iPad - The Geometer's Sketchpad Resource Center
The Geometer's Sketchpad - Wikipedia