Details Equipment [1] Plexiglas block [1] Overhead transparency with a mark [1] Overhead projector Script Turn on the projector and put the transparency on it. Focus the projector. Put the block on ...

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.

To Conduct Demonstration If necessary, protect non-glass surfaces of an overhead projector with clear plastic. Dip one Q-tip into concentrated hydrochloric acid (HCl) and a second cotton swab into ...

Using a bare LCD panel with an overhead projector is a decades-old hack we’ve covered before. The basic idea is fairly simple, but we’ve never seen anything that could be considered a semi ...

Instead, use a projector (ideally an LCD--with or without an interactive whiteboard--but otherwise an old-fashioned overhead will do), guaranteed to provide a more orderly and, in turn, effective ...