Distance/time and velocity/time labelling excercise. With answer sheet which could be used as a handout for notes.

as per the label

Preparing for a lesson with a student on waves, I was searching for diagrams to illustrate it. The internet is awash with suitable diagrams, but they all seem to be low-resolution bitmaps. Being a vector graphic fanatic, I made some high quality graphics of my own. I offer them in pdf, keynote and powerpoint formats. If you would like the editable svg files, get in touch with me via my web site

I illustrated the canonical molecular shapes in this very simple presentation. For fun really.

A simple simulation of the experiment. Unzip the file. Open the folder. Double click on ‘spring stretch version 4.html’ and it opens in your browser. Add the masses by clicking the buttons, and watch the spring stretch. Use a ruler to measure the extension. (The anomaly on the graph at 3N is probably due to a draught of warm air expanding the spring as a door was opened). Enjoy! A preview is availableon my web site. Please note: in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work. ©D&D production

I made a wacky interactive widget thingy to illustrate the gas laws. Change the property with the slider and it draws the graph. Just for fun really. A preview may be seen on my web site. Please note: in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work. stdobbs.com ©D&D production

A simple animation to jazz up ionic bonding a little: covers sodium fluoride, magnesium fluoride and lithium oxide. Short and sweet. Just double click on ionic bonding.html and it will run in your web browser. If it’s too small, just zoom in with browser controls. A preview can be seen at on my web site. Please note: in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work. stdobbs.com ©D&D production

Double click on the HTML file. Please note: in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work. ©D&D production

identify the homologous series from the structural formula

Double click body organs.html, drag the organ to the correct place. It can be previewed on my web site. **Please note: **in order to provide a rich interactive experience, my interactive resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work.

I have made a simulation of this experiment at four different temperatures. Double click on the “disappearing cross copy.html” file and there it is in your web browser. Students time the cross disappearing, after someone presses the button and shouts go. Saves a nasty experiment with hot solutions and sulfur dioxide. Use over and over again. You can make it huge by using the browser zoom controls. A preview is available on my web site. Please note: in order to provide a rich interactive experience, my resources are mini-web sites local to your computer. After unzipping, they comprise a folder containing the main .html file and another folder containing the graphic resources and my coding to make the resource work. Double click on the .html file and the resource will work. If, however , you move or delete any of the files from this hierarchy, the resource will not work.

This is better than my old one.

with an easter egg

wit a couple of easter eggs

with some easter eggs

because I wanted to

With a couple of easter eggs

A wordsearch about a play.

A wordsearch