MAXIMIZING THE USE OF LCD, LED PROJECTOR
“Indeed,
in no… country have I ever seen a good school without a blackboard, or a
successful teacher who did not use it frequently.”
INTRODUCTION
New technology introduced terms like multimedia,
hypermedia, etc. But let us admit that the technology divide is real. Many
schools especially in the remote areas especially those who have not been
reached by electricity for one reason or another, do not have a computer.
ABSTRACTION
The Chalkboard
The following practices of
dedicated professional teachers may help us in the effective use of the
chalkboard.
1.
Write clearly and legibly on the board. Take
note that there are children in the last rows.
2.
It helps if you have a hard copy of your
chalkboard diagram or outline.
3.
Don’t crowd your notes on the board.
4.
Make use of colored chalk to highlight key
points.
5.
Do not turn your back to your class while you
write on the chalkboard. Write side view as you talk. Don’t lose your eye
contact with your class.
6.
For the sake of order and clarity, start to
write from the left side of the board going to right.
7.
If you teach the grades and you think the
lines on the chalkboard are needed for writing exercise, then provide the lines
for your board.
8.
Look at your board work from all corners of
the room to test if pupils from all sides of the room can read your board work.
9.
If there is glare on the chalkboard at
certain times of the day, a curtain on the window may solve the problem.
10. If
you need to replace your chalkboard or if you are having a new classroom with
new chalkboard suggest to carpenter to mount the chalkboard a little concave
from left to right to avoid glare for the pupils benefit.
11. If
you need to have a board work in advance or that need to be saved for
tomorrow’s use (say a quiz) , write “Please Save” and cover the same curtain.
12. Make
full use of the chalkboard.
Chalkboard Techniques
A. Sharpen
your chalk to get good line quality.
B. Stand
with your elbow high. Move along as you write.
C. Use
dots as “aiming points”. This keeps writing level.
D. Make
all writing or printing between 2 and 4 inches high for legibility.
E. When
using colored chalk, use soft chalk so that it can be erased easily.
Light-emitting diode projectors represent a significant advance over traditional projectors. Instead of using a bulb filled with gas at high pressure, they use an array of LEDs to generate the light that shines through, the image element to project an image.
PROJECTOR
A projector is a device that
uses light and lenses to take an image and project a magnified image onto a
larger screen or wall.
The
LCD Projector
LCD (Liquid Crystal Display)
is a thin, flat panel used for electronically displaying information such as
text, images and moving picture. Its uses include monitor for Computers, Televisions,
Instrument panels Gaming devices etc. Using polarization of lights to display
objects.
Gene
Dolgoff – is credited with developing the LCD projector.
To display images, LCD
(liquid-crystal display) projectors typically send light from a metal-halide
lamp through a prism or series of dichroic filters that separates light to
three polysiliconpanels.
As polarized light passes
through the panels (combination of polarizer, LCD panel and analyzer),
individual pixels can be opened to allow light to pass or closed to block the
light.
The
LED Projector
Instead of a traditional
halogen lamp, they use (light-emitting diodes), which are more environmentally
friendly and longer lasting. LED projectors use either DLP technology,
replacing the color wheel and white-light lamp with red, blue, and green LEDS, or
LCoS technology, which is found in handheld projectors.
Light-emitting diode projectors represent a significant advance over traditional projectors. Instead of using a bulb filled with gas at high pressure, they use an array of LEDs to generate the light that shines through, the image element to project an image.
ADVANTAGES
OF USING PROJECTOR
·
Largest possible picture
·
Smaller images a great option also
·
Low cost
·
Space saving
·
Easy to install
LIMITATIONS
IN USING PROJECTOR
·
Dark room often required
·
Maintenance required
·
Installation can be more involved
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