An interactive whiteboard (IWB) is a large interactive display that connects to a computer and projector. A projector projects the computer's desktop onto the board's surface where users control the computer using a pen, finger, stylus, or other device. The board is typically mounted to a wall or floor stand.

They are used in a variety of settings, including classrooms at all levels of education, in corporate board rooms and work groups, in training rooms for professional sports coaching, in broadcasting studios and others.

An interactive whiteboard (IWB) device is connected to a computer via USB or a serial port cable, or else wirelessly via Bluetooth or a 2.4 GHz wireless.

A device driver is usually installed on the attached computer so that the interactive whiteboard can act as a Human Input Device (HID), like a mouse. The computer's video output is connected to a digital projector so that images may be projected on the interactive whiteboard surface.

The user then calibrates the whiteboard image using a pointer as necessary. After this, the pointer or other device may be used to activate programs, buttons and menus from the whiteboard itself, just as one would ordinarily do with a mouse. If text input is required, user can invoke an on-screen keyboard or, if the whiteboard provides for this, utilize handwriting recognition. This makes it unnecessary to go to the computer keyboard to enter text.

Thus, an IWB emulates both mouse and keyboard. The user can conduct a presentation or a class almost exclusively from the whiteboard.

In addition, most IWBs are supplied with software that provides tools and features specifically designed to maximize interaction opportunities. These generally include the ability to create virtual versions of paper flipcharts, pen and highlighter options, and possibly even virtual rulers, protractors, and compasses -- instruments that would be used in traditional classroom teaching.

A variety of accessories is available for interactive whiteboards:

• Projector — Allows a computer display to be projected onto the whiteboard. 'Short Throw' projectors are available from some manufacturers that mount directly above the board minimizing shadow effects. 'Ultra Short Throw' projectors are even more effective.
• Track — Allows the whiteboard to be placed over a traditional whiteboard or tackboard to provide additional wall space at the front of the room. Some tracks provide power and data to the whiteboard as well.
• Mobile stand — Allows the interactive whiteboard to be moved between rooms. Many are height adjustable as well.
• Printer — Allows copies of the whiteboard notes to be made.
• Slate or tablet — Allows students control of the whiteboard away from the front of the room.
• Personal Response System — Allows students to answer test questions posted on the whiteboard or take part in polls and surveys.
• Wireless unit — Allows the interactive whiteboard to operate without wires to the computer, e.g. Bluetooth.
• Remote control — Allows the presenter to control the board from different parts of the room and eliminates on-screen toolbars