Lesson # 14

Maximizing the use of Overhead projector 

and the Chalkboard

Overhead projector

The overhead projector is quiet, 'user-friendly' and clean and requires no technical knowledge or skill on the part of the person operating it, apart, of course, from the ability to change the lamps occasionally.

Weaknesses of the Overhead Projector

Unlike marker boards and chalkboards, overhead projectors require a small amount of maintenance. They are more likely to crack or break, so you must be very careful and always keep a spare bulb close at hand. Another disadvantage is that some teachers find the glare that is emitted from the overhead projector quite bothersome, even though this can be overcome by attaching a shade to the device.

is probably one of the most versatile and useful visual aids that has been made available to the modern-day lecturer. The overhead projector has long since replaced the traditional chalkboard as one of the main teaching aids and is used in lecture theaters and classrooms all over the world.

The overhead projector is quiet, 'user-friendly' and clean and requires no technical knowledge or skill on the part of the person operating it, apart, of course, from the ability to change the lamps occasionally.

Weaknesses of the Overhead Projector

Unlike marker boards and chalkboards, overhead projectors require a small amount of maintenance. They are more likely to crack or break, so you must be very careful and always keep a spare bulb close at hand. Another disadvantage is that some teachers find the glare that is emitted from the overhead projector quite bothersome, even though this can be overcome by attaching a shade to the device.

 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.

  

Strengths of the Overhead Projector than Chalkboard

The overhead projector definitely has a number of advantages that would outdo most other visual teaching aids. For instance, a lecturer can use it in just the same way that he or she would use a chalkboard, but the biggest advantage would be that with the overhead projector, lecturers all over the world now get to face the whole class and maintain eye contact all times with their students instead of having to turn around and write. As a teacher, you would know that this eye contact plays a very big role in both facilitative as well as expository teaching, and serves both as a means of receiving feedback from the class on how good or bad the session is and as an outward non-verbal communication medium for the teacher.


If designed well and planned well, these overhead transparencies will provide all the aides and cues that are needed during a lecture, so that you don't have to resort to the conventional note taking. These overhead transparencies are fairly compact when you compare them with some of the other types of visual aids like charts and can easily be stored in boxes, folders, files, or large envelopes.

 But for me I use projector because its Essay to use Than Chalkboard....That all Thank YOu...........