Here are some links that can be powerful whole-group instructional tools when used on an interactive whiteboard. These are grouped by subject area and subdivided by grade band.
A selection of excellent sites which work well on interactive whiteboards in the classroom - Topmarks Education"
Free Flash Resources for teachers. These resources are completely free and can be edited to suit your needs by editing the xml files
Think Bank provide Interactive Whiteboard training and free IWB resources for download.