Java Sketchpad is a java applet that allows you to put interactive
Geometer's Sketchpad sketches on a web page. It comes with a converter
that saves sketches as HTML pages. See the Java
Sketchpad Center: Information, source code and converter to download.
Look at the demos at the Java Sketchpad Center.
(Pages from my course in geometry for middle school teachers:)
A puzzle proof of the Pythagorean
Theorem .
Shamelessly copied from Key Curriculum Press.
Leonardo da Vinci's proof of the Pythagorean
Theorem .
Also copied from Key Curriculum Press.
Introduction to vectors
and translations ..
Triangle
congruence theorems .
Area formulas: parallelogram; triangle;
triangle.
Symmetry: reflection symmetry; rotation
symmetry; translation symmetry.
Kaleidoscopes: two mirrors; three
mirrors; four mirrors.
Slightly ridiculous stuff
Addition puzzle
Slide rules for: adding positive whole numbers;
adding fractions; adding
integers; multiplying.