From the Open University's Open Learn site.
Identify rotation and translation symmetries in wallpaper patterns. Think this will work well in class, but uses click & drag, so will probably use a wireless mouse rather than the IWB.
You choose which sets of multiples you would like to test your students on and number choices are created for you. Then drag them up to the correct part of the Venn Diagram. A great iwb resource!
Elementary interactive website for students to use on IWB or computer to learn about fractions. Fractions are available by recognizing/comparing & decimals/percents.