Interactive whiteboards are used with a computer and projector to provide a touch sensitive surface that you can use to operate the software and write on with a special pen. Take a look at the Wedgwood Interactive Whiteboard Guide for a comprehensive overview of this technology. Although written a numer of years ago, this technlearn briefing paper provides some useful information outlining benefits and how boards are being used, and will still be of interest to staff new to the technology.
The key findings from a BECTA report published in 2004 - suggests that using interactive whiteboards encourages the use of creative teaching materials, engages and motivates learners to a greater extent than traditional models of teaching and encourages more learner participation.
Going Beyond Display: Teaching interactively with electronic whiteboards - provides an interesting insight into working with interactive whiteboards and gives pointers on how to exploit the tools they provide. Take a look at the video below of using an interactive whiteboard to help you get to grips with the concept of using an interactive board yourself.