transparencies correct pp
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Universidad Autónoma de Chiriquí
Faculty of Humanities
School of English
Materials Development-Eng 420
Transparencies (OHP)Professor: Marisol Barraza
Done by: Gantes & Montero
May 18th, 2016 1
IntroductionOverhead Projector was created by Jules Duboscq, in 1870s.Used during the Second World War Used as a teaching tool since 1950s.Become popular easy to used Provides an interactive environment for educators.
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Table of Contents Definitions Parts of the OHP How the OHP can be used in different instructional situations
Advantages of using OHP Disadvantages of using OHP Guideliness for use OHP
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Table of Contents Standards in using OHP Designing OHP transparencies-basic principles
Producing computer generated OHP materials Display techniques Tips for Effective use of OHP Materials Conclusion Reference page
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Definitions
Overhead Projector: machine designed to project an
image, text, and drawings onto a small
screen or whiteboard
Transparencies: pages transparent and
flexible used to place information and images
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Parts of the OHP
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How the OHP can be used in different Instructional Situation
Expository teaching of
virtually any type
Group learning situations
Enabling members of a group
to display material that they
themselves have produced
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How the OHP can be used in different Instructional Situation
To present activity plan or objectives
To show tables
To systematize the information to be conveyed
To list brain-storming ideas
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Advantages of using OHP
It is portable
Get transparency materials in low cost
Located in front of the room
Used in a room with normal lighting
It is simple to operate
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Advantages of using OHP
Used as a chalkboard or market board
Modify transparencies during the presentation
You can write without turning your back
Maintain eye contact
Audiences can follow handout or take notes
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Disadvantages of using OHP
It requires a power supply
Needs suitable surface about four square feet
Need spare bulb in case unexpected events
Many users do not give sufficient thought
to the production of their display material
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Disadvantages of using OHP
Tendency to include too much information in
a single frame
Teachers or lectures overuse the OHP
Difficult to transport because of its weigh
Cost of materials required to operate them
Used with small audiences.
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Guideliness-How to use the OHPLocated it in a place where everybody
can see the screen.
Arrange the projector and screen in a way
to minimize it. It should have appropriate
angles in horizontal and vertical planes.
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Guideliness-How to use the OHP
Adjust the distance from projector to
screen so the image fills the full area
Make sure the acetate and open head
surface are clear and free of dust or dirty
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Standards in using OHP
Make the text, illustrations or pictures in
your transparencies big enough
Schematize: present essential points, one
transparency every 2 or 3 minutes
Use a pointer to emphasize points on the
acetate
Plan for a dramatic presentation
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Standards in using OHP Check visibility; do not block the screen
Plan your narration.
Turn on the lamp only if there is
a transparency on the projector
Put off the projector for prolonged explanations,
or when it is not needed
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Designing OHP transparencies-basic principles
There two basic Principles:1. Do not try to put too much
information on a single transparency.
2. Use a clear, systematic layout.
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Producing computer generated OHP materials
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Use computer to design and produce OHT
Create both alphanumeric and graphic
materials and print them out in OHP
transparency form - in full color, and with
whatever size of lettering is wanted
Display Techniques
a) Progressive DisclosureInvolves covering up all or part of the material on a given transparency,and progressively revealing the material as the presentation proceeds
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Display techniques
b) Framing TransparenciesEssential information placed visible for your audience and notes written for the teacher’s support
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Display Techniques
c) Use of overlaysWhole area of transparency is revealed from the start, with additional information being added to the original display by superimposing further transparencies on the original.
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Display Techniques
c) Use of Overlays 1. To lay separate transparencies
2. Make use of hinged overlays
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Tips to use OHP Effectively
1.Just write key points on transparencies
2.Keep transparencies simple - 7X7 Rule
3.Use 18 point type- no more than two type styles
4.Mix upper and lower-case letters for easy readability
5.Do not use exclamation marks, they look like number one.
6.See your overheads from all angles
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Tips to use OHP Effectively
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7. Do not turn off all room lights
8. Turn projector lamp off during discussions
9. Never stand anything between the projection and screen
10.Give people time to read
11.Talk to your listeners not the screen
12. Before moving wait for period time to cool
Down - bulb may explode.
Materials
a)Transparenciesb)Markersc)Rulerd)Cleaning suppliese)Bulbs
f) A pointer
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Conclusion OHP is a useful tool to project
information for a small audience.
It provides some advantages using it
as well as some disadvantages.
There are some usage principles
teachers should follow to make its
use effective.26
References
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Aceret, R. (n.d.). The Overhead Projector: Advantages and Standards. Educational Technology. Retrieved from http://ed-tech124.blogspot.com/2013/08/the-overhead-projector-ohp.html
Corey, W. (1999).Overhead projector usage. Business and professional
toastmasters, club #1169. Retrieved from http://regainthemagic.com/BPToastmasters/overhead.html
References
Ellington, H. (1987). A Guide to the use of the overhead projector. Teaching and learning higher education. Retrieved from http://files.eric.ed.gov/fulltext/ED289497.pdf
Mott, E. (1983). How to make transparencies for the overhead projector. Azcentral.
Retrieved from http://yourbusiness.azcentral.com/make-transparencies-overhead-projector-1185.html
Sinan, C. (1991). Using overhead projector in the classroom: Advantages and
disadvantages. Csinan Blog. Retrieveed from https://csinan.wordpress.com/2013/04/11/47/
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