One solution is to use an 'ultra-short-throw'projector which attaches onto the top of the interactive whiteboard and casts the projection down the front but with no room for shadows.
More and more offices and schools these days feature an interactive whiteboard and the industry has recently seen a large amount of growth.
Though they differ in their operation and exact specifications, most interactive whiteboards can operate as normal computers as well as make use of specially created software.
Among this software will normally be an'on-screen' keyboard that will allow the user to input text with their pointer or finger as you would on many smart phones.
Normally an alternative system of text and data input will be handwriting recognition in which a user's handwriting will be translated into typeface.
By using the touch-screen mouse and keyboard, the entire operation of the computer can be controlled from the interactive whiteboard.
This makes other software more intuitive to control and also more engaging to watch for an audience.
For example a power point presentation now becomes something that does not require the individual to keep returning to the laptop or a second person to control the slides.