Using a modern web browser, particularly on a touch screen device, offers a much richer canvas than a printed page to teach and communicate. This is especially true for engineering and scientific topics. This website contains example 3D models, interactions, animations, and calculations for instructional use.
A JavaScript animation of drive rods on a steam locomotive.
Animation of the piston for a steam locomotive.
A gallery of WebGL pages.
Some thoughts on an XML Schema for exchanging GD&T.