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Transcript of Audio-Visual Media
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TECH3008
Introduction to Educational Technology
Dr. Alaa SadikDepartment of Instructional & Learning Technologies
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TECH3008
Introduction to Educational Technology
Presentation Three:
Audio-Visual Media
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Audio-Visual Media1. Writing boards2. Flipcharts3. OHP transparencies4. 35 mm slides5. Videotapes 6. Models/real objects/shapes7. Audiotapes8. Audio-conferencing9. Video-conferencing 10. Digital projectors11. Smart classrooms12. Computers (software and storage media)13. The Internet
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Main Points
1. Images
2. Description
3. Advantages
4. Disadvantages
5. Basic principle and guidelines for classroom use (tips)
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Writing Boards
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Writing Boards
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Writing Boards
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Writing Boards
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Writing Boards
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Advantages of the Writing Board Available in most training rooms Does not require electricity Easy to use and inexpensive Suitable for use by both clinical trainers and
participants Excellent for brainstorming, problem solving,
making lists and other participatory activities
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Disadvantages of the Writing Board The board cannot hold a large amount of
material Writing on the board is time-consuming It is difficult to write on the board and talk to
the participants The board can get messy There is no permanent record of information
presented
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Tips for the Writing Board
Keep the board clean Use chalk or pens that can be seen Make text and drawings large enough to
be seen by all Prepare complex drawings in advance
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Tips for the Writing Board
Underline headings and important or unfamiliar words
Do not talk while facing the board Do not block the participants’ view Allow time for participants to copy
information from the board
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Flipcharts
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Flipcharts
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Advantages of the Flipchart
Available in most training rooms Easy to move from room to room Do not require electricity Several may be used simultaneously Easy to use and inexpensive
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Advantages of the Flipchart
Suitable for use by trainers and participants
Excellent for brainstorming, problem solving, making lists
Pages can be prepared in advance Pages can be removed and taped on the
walls
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Flipchart Techniques
Use wide-tipped pens or markers Print in large block letters Use different colored pens Use headings, boxes, cartoons and borders Use bullets (•) to delineate items on the page Leave plenty of white space
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Flipchart Techniques
Avoid putting too much information on one page When pages are prepared in advance, use every
other page Hang flipchart pages with tape To hide a portion of the page, fold up the lower
portion of the page and tape it Face the participants, not the flipchart, while talking
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Transparencies
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Transparencies
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Transparencies
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Transparencies
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Transparencies
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Advantages of Transparencies
The projector is simple to use Can be used in almost any training room
which has electricity Can be used with the classroom lights on Can be prepared in advance which saves
time
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Advantages of Transparencies
Are inexpensive Can be prepared quickly and easily Can be used repeatedly
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Disadvantages of Transparencies Cannot project text and images directly
from the printed page Be careful not to block the participants’
view of the screen
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Producing Transparencies
Use pens to create text or drawings on plastic or acetate sheets
Use a copy machine with transparency film designed for copiers
Use a computer and printer
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Preparing Transparencies
Limit the information to one main idea and about 5-6 lines of large type
Use large lettering Print text Make graphics and drawings large enough
to be seen
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Preparing Transparencies
Mount transparencies in frames or insert them in plastic pockets
Number the transparencies Store the transparencies in a box,
envelope or a “pocket” made from folders or plastic
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Using the Overhead Projector
Locate and check the operation of the on/off switch Have an extra projector bulb Focus the projector and check the position of the
image Turn the projector on after the transparency is
placed on the glass Turn off the projector before removing the
transparency
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Using the Overhead Projector
Once the projector is on move away from the projector so participants can see
Face the participants, not the screen, while talking
Show one point at a time Use a pointer or pencil focus attention Allow plenty of time for the participants to read
what is on the screen
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Slides
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Slides
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Advantages of Slides
Relatively inexpensive and easy to produce Can be made locally by the trainer Are good for showing individual steps of a
procedure or close-ups of equipment Can be shown in a fairly light room Can be used with audiotapes to produce a
slide show with narration
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Disadvantages of Slides
Slide projectors are much more expensive than overhead projectors
Slide projectors are more fragile than and do not tolerate voltage fluctuations as well as overhead projectors
Slides are not updated as easily or produced as inexpensively as transparencies
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Preparing Slides
Limit each slide to one main idea Text slides should be short and concise No more than 35 words (approximately
five lines of text)
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Preparing Slides
Legibility of the material on the slide is crucial
Number the slides in pencil or pen on the mounting frame
Mark or “spot” slides before placing in the tray
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Using the Slide Projector
Arrange the room so all participants can see the screen
Set up and test the slide projector Make sure there is an extra projector bulb Locate the focus control, check the focus
and position the image on the screen
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Using the Slide Projector
Run through all the slides in advance Determine if all or some of the lights can
be left on During the presentation, avoid rushing
through a series of slides
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Videotapes
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Videotapes
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Advantages of Using Videotapes Capture events the eye alone would not
see Steps of a procedure or technique can be
shown by slowing down the videotape Videotapes provide better color and detail Videotapes can be prepared by the trainer
to reflect local conditions
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Advantages of Using Videotapes Commercially developed videotapes can be
purchased or borrowed Animation can be used to show an abstract
concept TV monitors tolerate fluctuations in voltage
much better than projectors Video players are less expensive and easier
to maintain than slide projectors
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Disadvantages of Videotapes
Commercially prepared videotapes are often outdated
Videotapes may have been edited and omit or rearrange key training steps in the procedure
Participants may be distracted by cultural differences
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Using Videotapes
Preview the videotape Check to be sure that the videotape is
compatible with the videotape player Cue the videotape to the beginning of the
program Arrange the room so that all participants
can see
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Using Videotapes
State the session objective Provide an overview of the videotape Ask participants to look for a number of specific
points during the videotape Discuss the videotape after it has been shown Prepare test items based on the videotape
content if appropriate