Interactive whiteboards, or IWBs, are technological replacements for traditional blackboards, whiteboards and overhead projectors. An IWB consists of a large screen where images from a computer are projected. Users can interact with the computer by touching or writing on the screen with a finger, pen or stylus. Interactive whiteboards have become increasingly popular in classroom settings and corporate offices because they allow lessons and presentations to include a wider range of multimedia materials in an engaging and dynamic format. There are three main types of IWB technology available: resistive technology, electro-magnetic and laser scanners.

The truth is that the interactive white boards are the newest advancement in a whole line of slates introduced over the last few centuries, all seen as tools for educational reform. However, new tools in the evolution of educational technology have often been met by resistance to change.

Historically, children transitioned from writing on prepared bark to writing on hand-held slates. Then blackboards for broad classroom displays were introduced and green boards, the latter of which was touted as better than blackboards for reducing eye-strain.

Whiteboards requiring use of dry erase markers became the next best thing because they eliminated health problems due to chalk dusk and were cleaner to use. Much has been written about features of IWBs that appeal for teacher-led instruction. The IWB is a touch-sensitive Interactive Display that connects to a computer and a projector. It is both an output and input device. You can see all images as you would on a computer screen. You can write on it with electronic pens and use your finger as a mouse. As with content on a computer, you can save and print annotated output, recall it and revise annotations. Some models allow the sequence of events in a lesson to be saved in video format. This latter has the advantage for reuse and is helpful for learners who might have missed a lesson or wish to review. Content can be shared with other educators and parents.

Interactive whiteboard Accessories are available, such as wireless slates that allow teachers to move about while having access to the IWB and student response systems, known as clickers that enable teachers to get instant feedback for quick assessments.