Transparencies correct pp

  • View

  • Download

Embed Size (px)


Universidad Autonoma de Chiriqui

Universidad Autnoma de Chiriqu

Faculty of Humanities

School of English

Materials Development-Eng 420

Transparencies (OHP)

Professor: Marisol Barraza

Done by: Gantes & Montero

May 18th, 2016



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.


Table of ContentsDefinitionsParts of the OHPHow the OHP can be used in different instructional situationsAdvantages of using OHPDisadvantages of using OHPGuideliness for use OHP3

Table of ContentsStandards in using OHPDesigning OHP transparencies-basic principlesProducing computer generated OHP materialsDisplay techniquesTips for Effective use of OHPMaterials Conclusion Reference page4


Overhead Projector: machine designed to project an image, text, and drawings onto a small screen or whiteboardTransparencies: pages transparent and flexible used to place information and images5

Parts of the OHP


How the OHP can be used in different Instructional SituationExpository teaching of virtually any typeGroup learning situationsEnabling members of a group to display material that they themselves have produced7

How the OHP can be used in different Instructional SituationTo present activity plan or objectives To show tablesTo systematize the information to be conveyed To list brain-storming ideas8

Advantages of using OHP

It is portableGet transparency materials in low costLocated in front of the roomUsed in a room with normal lightingIt is simple to operate


Advantages of using OHP

Used as a chalkboard or market boardModify transparencies during the presentationYou can write without turning your backMaintain eye contactAudiences can follow handout or take notes10

Disadvantages of using OHPIt requires a power supplyNeeds suitable surface about four square feetNeed spare bulb in case unexpected eventsMany users do not give sufficient thought to the production of their display material


Disadvantages of using OHPTendency to include too much information in a single frameTeachers or lectures overuse the OHP Difficult to transport because of its weighCost of materials required to operate themUsed with small audiences.12

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.13

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 dirty14

Standards in using OHP

Make the text, illustrations or pictures in your transparencies big enoughSchematize: present essential points, one transparency every 2 or 3 minutesUse a pointer to emphasize points on the acetatePlan for a dramatic presentation


Standards in using OHPCheck 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


Designing OHP transparencies-basic principles

There two basic Principles:Do not try to put too much information on a single transparency. Use a clear, systematic layout.17

Producing computer generated OHP materials

18Use computer to design and produce OHTCreate 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


Display techniquesb) Framing TransparenciesEssential information placed visible for your audience and notes written for the teachers support


Display Techniquesc) 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.


Display Techniques

c) Use of Overlays 1. To lay separate transparencies

2. Make use of hinged overlays


Tips to use OHP Effectively

Just write key points on transparenciesKeep transparencies simple - 7X7 RuleUse 18 point type- no more than two type stylesMix upper and lower-case letters for easy readabilityDo not use exclamation marks, they look like number one. See your overheads from all angles23

Tips to use OHP Effectively24Do not turn off all room lightsTurn projector lamp off during discussionsNever stand anything between the projection and screen Give people time to read Talk to your listeners not the screen Before moving wait for period time to coolDown - bulb may explode.


TransparenciesMarkersRulerCleaning suppliesBulbs A pointer25


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.



27Aceret, R. (n.d.). The Overhead Projector: Advantages and Standards. Educational Technology. Retrieved from, W. (1999).Overhead projector usage. Business and professional toastmasters, club #1169. Retrieved from


Ellington, H. (1987). A Guide to the use of the overhead projector. Teaching and learning higher education. Retrieved from, E. (1983). How to make transparencies for the overhead projector. Azcentral. Retrieved from, C. (1991). Using overhead projector in the classroom: Advantages and disadvantages. Csinan Blog. Retrieveed from