Google Chrome withdrew support for Adobe Shockwave in September 2016.
Practically speaking it is very difficult, and often impossible, to install Shockwave onto most computers. The recent versions of both Microsoft Windows and Mac OS no longer support Shockwave.
We are making good progress converting the older Shockwave resources to the latest HTML5 technology, in order of popularity.
Coming soon! Lesson building is temporarily disabled in order to complete several feature enhancements. It will be reinstated shortly.