MAXIMIZING THE USE OF THE OVERHEAD PROJECTOR AND THE CHALKBOARD
SUMMARY:
CHALKBOARD
. Today the chalkboard comes in all colors, shapes, sizes and degrees of portability. Some have special surfaces that require a particular type of felt-tip pen rather than chalk. Most times, however, this medium includes a large writing area, a writing substance (usually chalk), and an eraser.
The chalkboard is so common that not much attention is paid to maximizing the use of this Fantastic sub-strategy, but by following the guidelines below, the potential of even the trusty old "blackboard" can be greatly increased.
ADVANTAGES:
1. Availability.
2. The chalkboard is inexpensive, especially when the usable life of the board is considered.
3. It is flexible in use in the sense that instructors may use it, learners may use it and changes can be easily made through erasure.
4. Space.
5. The chalkboard can be used to present more formally prepared lessons, or for informal, spontaneous sessions.
6. Ideas can be dealt with at all levels from facts to concepts
7. Various colored chalk or pens can be used to develop the topic, show parts or build associations.
8. A point-by-point outline of a presentation can be made on the spot with diagrams, charts, and other accentuation drawn at the appropriate moment.
9. The visual communication of the chalkboard directs attention of the class to the purposes of the lecture or discussion.
10. Ideas or topics suggested in discussion can be listed on the board, reorganized, deleted, added to, and put in final form.
11. Test or discussion questions can be put on the board and covered up before the class assembles, then revealed at the appropriate time.
12. A number of learners can do practice or drill work on the board at one time, allowing the instructor to give feedback immediately.
DISADVANTAGES:
1. The chalkboard carries with it “temporariness".
2. Chalkboards are often fixed in such a way that they are not always at a comfortable height for all potential users.
3. Being fixed, chalkboards can put restrictions on the use of classroom space and classroom activities as learners need to be placed where they can see the boards.
4. Problems can arise for learners who have vision impairments.
5. With age, use of certain types of chalk, and/or improper cleaning practices, boards can become "cloudy" as they retain chalk dust.
6. Some instructors are psyched-out of using the board because they feel a lack of artistic ability.
7. Motion cannot be easily shown.
8. A teacher's handwriting or spelling deficiencies are most obvious when using the chalkboard.
9. Chalkboard work can be messy.
11. Writing on the board can be "down time" and may break the class’s train of thought and/or discussion.
OVERHEAD PROJECTORS
The overhead projector 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.
Even though computer-based data projectors are increasing in popularity, they are indeed very expensive and this means that they are in no way a match for the overhead projector. Therefore, it is very important for lecturers and teachers to know how to use overhead projectors effectively, so as to exploit its potential to the maximum level.
BENEFITS:
• It is multi-purpose and can be used to present pre-prepared material, which enables lecturers to build notes, tables, diagrams, and so on., and these can be used anytime, repeatedly.
• 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.
• it does not require a room to be darkened, so it allows students to take notes easily. It can also be used in any kind of room, except ones with extreme bright lights or in the direct sunlight.
DISADVANTAGE:
lecturers and teachers tend to overuse these projectors only because they are so convenient. They employ it in situations where, on other occasions, other visual aids would have been more effective.
- They are more likely to crack or break, so you must be very careful and always keep a spare bulb close at hand.
- 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.
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