DCSF & Becta (2007). It can either be a standalone touchscreen computer used independently to perform tasks and operations, or a connectable apparatus used as a touchpad to control computers from a projector. This also avoids the problem with front-projection boards that the presenter has to look into the projector light while speaking to the audience. A portable IR pen-based whiteboard works on a variety of surfaces — an existing whiteboard, a flat wall, even a chalkboard with dry-erase paint, transforms those surface into an interactive whiteboard. Group interaction. An interactive projector IWB involves a CMOS camera built into the projector, so that the projector produces the IWB image, but also detects the position of an active IR light pen when it contacts the surface where the image is projected. This sequence allows the computer to align the touch surface with the display; however, it has the disadvantage of having tiny fiber-sized "dead spots" in the resistive touch surface where the light sensors are present. The authors of the study argued that "mediating interactivity" is a sound concept, offering "a ... theoretical explanation for the way in which the multi-level modelling (MLM) analyses link the length of time pupils have been taught with interactive whiteboards to greater progress in national test scores year on year.". The accuracy is high since the coordinates are usually fixed at about 600 dots per inch. The digital pen uses this pattern to store the handwriting and upload it to a computer. Again, such a board requires no special instruments. It is an ideal when collaborative learning and a small group work is being aimed at. It enables the lecturer to sit at the computer with a student at the whiteboard and the class contributing ideas and offering suggestions. Interactive whiteboards promotes collaboration among students and group discussion and participation. This is because recording tools can be utilized for audio learners, the board can be touched and manipulated by tactile learners and visual learners can easily track whatever that is happening as a lesson proceeds. It basically promotes interactive teaching. The interactive whiteboard in the classroom is a cost saver as the technology demonstrates how a single computer can provide an appropriate learning stimuli for an entire classroom. Glover, D., & Miller, D., Averis, D., & Door, V. (2005) The interactive whiteboard: a literature survey. An infrared interactive whiteboard is a large interactive display that connects to a computer and projector. School Science Review (86) 316: 97–103. The first interactive whiteboards were designed and manufactured for use in the office. The education system has experienced tremendous changes in the past few years as the traditional heavy textbooks are being replaced by convenient eBooks while notebooks are replaced by devices such as interactive whiteboards, Tablets and iPads. This technology uses infrared light and ultrasound positioning technology. In recent[clarification needed when?] Some manufacturers offer short-throw projection systems in which a projector with a special wide angle lens is mounted much closer to the interactive whiteboard surface and projects down at an angle of around 45 degrees. It can be used in work places as well as in classrooms of different levels of learning. The BECTA (UK) commissioned a study into the impact of Interactive Whiteboards over a two-year period. It is also more cost effective compared to equipping every student with a laptop or even an entire IT room. Wireless unit – Allows the interactive whiteboard to operate without wires to the computer, e.g. There was also clear evidence of similar impacts in Key stage two – ages 7 – 11.
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