An interactive whiteboard is a large, touch-sensitive board connected to a digital projector and computer. The projector displays the computer screen image on the board, which can then be controlled by touch or with a special pen. An interactive whiteboard allows users to capture and annotate images and text from various sources, emphasize or reveal parts of the screen, add and move text and items, and link information between files and websites. Lessons can be stored as flipchart pages for future use. Interactive whiteboards can increase student motivation and engagement while catering to different learning styles and promoting active participation. However, they also risk information overload and a substitution of "chalk and talk" teaching if not used effectively.