I made a simple worksheet about density. 5 pages. Two of info, one table of values, a page of questions and my answers.
I have now added a keynote and powerpoint version.
In the past I have used a physical water circuit to explain to groups concepts such as potential difference and current. I wanted my own diagram of this, so produced this. Someone, somewhere might find it of use.
I have tried to illustrate the concept of separation of water molecules rather than breaking covalent bonds when water is heated with a quick and dirty animation. Click on the water boiling.html file and it will run in your browser.
There is a beautiful graphic depicting this on the internet. However, it is a bitmapped graphic . I have adapted it as a a scalar graphic, with improvements. Please get in touch if you want an editable version.
I made a simple display of the atomic structure of various isotopes, with the emphasis on simplicity and clarity. Just because I wanted to. I also included it as keynote and powerpoint presentations.
I made a wacky presentation showing some constellations, and a tiny bit of information on the solar system. I also made a movie of the presentation set to music.
Just for fun really.