A handy tool that can be used with any brand of interactive whiteboard has been developed. It's called C-Adds and contains many easy to use tools for schools like traffic, math, language and some common tools like a birthdaycake (you can blow out the candles), stopwatch and a traffic light (deferred attention). The Adds have been developed by teachers. At
http://www.ctoolsadds.com/ you can apply for a free evaluationversion you can use for 10 days. If you like C-adss you will be able to buy it for only Euro 15,00 (for each PC).
