Thank you for your patience as we recreate the entire body of work done over the past 22 years. We anticipate a few tweaks and fixes to this as we refine our process*, but the current version should work for now. Simple & Complex Machines is one of our most popular lessons and the first to be progammed into code that will run on comtemporary browsers. We will love and will miss Flash, and we look forward to uploading renewed content very soon.

Coming soon: Lunar Phases, Kinetic Energy, Seismic Waves & Tides.

*We know about a few playback issues with the new Simple & Complex Machines labs, but we also want you to be able to use them ASAP; even while we fix some of the unplanned features. If you want to report an issue email Julie