As we enter into the new millenium, it seems that everything is electronic, digital, or virtual. Heavy emphasis is being placed on digital gadgets and gizmos, when some of the simplest tool can advance knowledge and learning. An example of one of those simple and inexpensive tools is the overhead projector. A projector, whether it be standard, portable, or an LDC-enhanced, can be more useful to a roomful of students than we dare to imagine in this high-tech day in age.

• With a simple plug, a table with wheels, and a pull-down screen or just a plain wall, an overhead projector saves time and is an excellent presentation tool.
• With an overhead projector, a teacher can prepare his or her lessons in advance and not waste precious classroom time writing out entire lessons for students on the chalkboard.
• If a photocopier is not available and if paper is scarce, a projector can be an excellent substitute by illustrating what a ditto would, using colors. They are also instant photocopies!
• Transparencies, clear plastic sheets used for the projector, can be easily photocopied or written on by hand.
• Ready-made transparencies are available and are often related to the coursework. These are relatively inexpensive.
• A school can build, over time, a resource package of transparencies, bought or made by teachers.
• An entire school building can use the projector by wheeling it around to the classrooms as it is needed. The cost may range from US$175 to US$700.

Projecting Your Computer Screen