Question

Advantages and disadvantages of using ohp in education

Answer 1

Answer:

Equipment Costs

Overhead projectors carry a price tag that can run from 10 percent to 50 percent of the cost of their LCD-based cousins. Both device types use specialized lamps, but the price differential continues when you evaluate their parts head to head. In some cases, you can buy a new overhead projector for the cost of an LCD projector lamp. If you present materials that don't require computer projection of A/V content, an overhead projector will save you money, both when you buy it and over its functional life.

Transparencies

Transparency film may cost more than regular office paper, but it's available at virtually any office-supply store, local or on the Web. If you prefer to purchase environmentally friendly materials, look for transparencies with recycled content. Regardless of whether you use a laser or inkjet printer, or direct your output to a networked color copier, you'll find a film product formulated for your device. You can prepare your transparencies well in advance of your presentation and reuse them each time you give the same talk. If parts of your message change, replace the outdated transparencies with new ones.

Annotations

Because overhead projectors display anything you print onto sheets of clear plastic material, their transparencies make it easy to annotate your presentation pages with comments you elicit from your audience or points of emphasis related to your data. With an inexpensive wax or grease pencil, you can write or draw on your transparencies during your talk and wipe the notes away with a tissue or paper towel. Overhead projectors can't display anything through opaque materials, so you can cover parts of a transparency with a piece of cardboard and reveal your talking points one at a time, focusing audience attention.