In The Overhead Projector: Don’t Overlook It (Part 1), I explained why it’s better to use a projector (be it an old-fashioned overhead or LCD) than to write on the board. Now we turn to how to use a ...
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 ...
The classroom is progressing from blackboards and overhead projectors to whiteboards and digital projectors. Is your school ready for the next evolutionary step? Want to show the class a web site? If ...
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