Trying to bridge the gap between my 9th grader's concrete and abstract thinking
(and have fun with my 40D, Photoshop, and Geometer's Sketchpad (GSP) in the process..)

I'll take the Geometer's Sketchpad files to class but will show jpgs as examples..

1) Capture an image or two
2) Photoshop them down to 800xLess or Lessx800 pixels (not essential, but makes life easier)
3) Open in Paint (or equivalent), crop, then Edit->Copy
4) Open new sketch in Geometer's Sketchpad and Edit->Paste the image
5) Turn on the grid
6) Drop two points, Construct->Line then Measure->Equation
7) Repeat until satisfied