Light corn syrup is used to rotate the plane of polarized light on the stage of an overhead projector. A polarizing filter allows only those photons with electric fields oscillating in a single plane ...

A key to keeping students on task is closing their window of opportunity to get off task. And never is that window more wide open than when you turn your back to write on the board. Case in point, my ...

Overhead projectors are useful tools to present large visuals in the classroom or boardroom, but poor care and the temperature of the machine cause possible risks to your health and safety. To ensure ...

Slide shows and overhead projectors with images that are crooked, upside down, mirror imaged, or simply lost, are well and truly a thing of the past. Data projectors suited to PowerPoint presentations ...

LCD video projectors are rapidly becoming standard fixtures in many schools across the U.S. Teamed with a computer, DVD player or other media device, the LCD projector displays clear, high-resolution ...