Audio visual aids pt

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ppt prepared by jolly mathew ,m.sc (n) firrst year student

Transcript of Audio visual aids pt

  • 1. Audiovisual aids are any device which can be used to make the learning experience more concrete , more realistic and more dynamic KINDAR . S. JAMES

2. Audiovisual material should function asintegral part of educational programme Audio visual aids should be centralized underspecialized direction and leader ship Advisory committee should be appointed forthe selection and co-ordination of AV aids Instructors have to help the student how touse AV aids Budget appropriation should be maderegularly Legal aspect should be considered 3. Projected av aids 4. Opaque projector, built of large blackConsists two mirrors at top & bottom;1000w bulbprincipleLight rays passes through the first mirror, then to theobject, light rays from the illuminated picture thenfocuses to the second mirror , then it is projected toscreen by using a convex lens operation :handle beneath the epidiascope islowered then the picture want to project is placed on theplate and handle is fixed again , then switch on light 5. Helpsin retention It is easilyof material breakable Attract attention It should be Arouse interest planned inamong the student sequence Tests studentsinteresting 6. 7. Magic lantern, used for projecting film stripsIt contains condensing lenses to concentrate alllight into beam,500w bulb, smooth channel forthreading the filmNear the base of the channel there is knob whichcarries a film strip, can be turned by hand to pullthe film strip through the projectorOPERATION : projector is placed on the table, asface to the screen, insert one end of the film stripin the knob (inverted position), film strip isadvanced by turning the knobThe blower and the lamp switched on; distancebetween the projector and the screen is adjustedto get the picture on the screen 8. It is an economical Theequipmentvisual materialused for is quite It is to make aexpensiveconvenient tohandle and carry Takes up littlespace and can beeassily stored Logical sequenceto teaching 9. OVER HEAD PROJECTOR Vital teaching aid, replaces chalkboard, produces images behind and over thehead of the teacher It consists metal box with 1000w bulb and a concave reflector vertical rod on the side of the box carries objective convex lens and mirror which can be slows up and down by using rock and pinion arrangementSize of the sheet is 25cm *25 cm 10. STEPS IN USING OHP Put theplug into Move the theobjective power lens andPlace the Explain the wall mirror up OHP on material on the socket andthe tabletransparency switchdown tofacing towith a small on the get the screen pointer blower image onfirst and thescreenlamp 11. Permits the teacher OHP is too costlypointing the material & Writing by some type ofobserve the student on pen get blotted out onthe same timeplastic It can be used in fairlylighted room Materials projected can bechanged quickly and easily Operation of OHP isconvenient OHP can be used withother type of AV aids 12. Still picture gives illusion of spacePhotographs are made by stereoscopic cameraObserver receives the impression of realityTwo photographs being taken from slightly differentangle which are enlarged and merged into one view 13. Micro film contains photographed reading material eachframe being reduced photo of printed page. It can be usedfor the storage and retrieval of information. when microfilm is passed through microfilm reader, an enlarged imageis found on the on the screen 14. CARTOONMetaphorical presentation of reality, humorous caricatureIt is an interpretative which uses symbols to portray anopinion , situationQuality of drawing should be highADVANTAGESInitiate certain lesson, motivate students to start adiscussion, make the lesson lively and interesting 15. COMIC STRIPSSeries of pictures very interesting in teaching stories, historical events, scientificprocessIt enhances imagination , stimulate reality and involvement 16. CHARTSVisual illustrative media for depicting the relation betweenmain idea and supporting factspurposes of charts for showing relation by means of facts and figuresTo show the continuity of processFor presenting abstract ideaFor showing the development of structureTo stimulate thinkingHOW TO USE THE CHART EFFECTIVELY? 17. Types of chartNarrative chart : narrating the idea and the factsCause and effective chart :relationship between rights andresponsibilitiesChain chart: expressing idea and facts in the form of cyclesEvolution chart: for expressing changes in specific item frombeginningStrip tease chart : expressing information step by step. it hasGreat suspense value, holding attention and building interest,Increases interest and imagination of audiencePull chartFlow chartTime or table chartJob chartTree chartFlip chartPie chart 18. FLASH CARDSThese are the sequence of cards which are presented before theaudience in proper sequence to till a complete story, size :25 *30cm, it should contain picture or diagramsPREPARATION OF FLASH CARDcut full sheet chart paper into four equal partsHeight of the writing should be 5cmIt should hold in a way that the audience can see properlyADVANTAGES OF FLASH CARDSused to introduce and present the topicCan be used to review a topicCan be used to develop cognitive ability of recognition andrecall of students 19. GRAPHSIt depicts numerical or quantitative or statisticaldata are presented in the form of visual symbolsTYPES OF GRAPHSPIE GRAPH:Data are presented throughthe sectors of circle 20. BAR GRAPHCategory 4Category 3Series 3Series 2Category 2Series 1Category 1 024 6A graphic presentation extends the scale horizontally along thelength of the bars 21. LINE GRAPH 6 5 4 3 Series 1 Series 2 2 Series 3 1 0 Category Category Category Category1234Concepts are presented through the lines drawn either horizontallyOr vertically .The plotted points are connected each another 22. Pictorial graphPictures are used for expressing the idea ,moreattractive and easily understood. Vivid pictures areused for depicting the information 23. Display boards 24. chalk boardIt is the life of the class room, helps to teacher inexplaining, illustrating, and giving notes to children. It can bemade of plastic, wood, cement or glass types of chalk boardORDINARY CHALK BOARD: it is movable and adjustableAnd contains a wooden supportROLLER TYPE: made of thick canvas, wrapped on a rollerMagnetic board: made up of steel on which magnet canused to hold the objectsBLACK OR GREEN BLACK BOARD: framed with wood andavailable on black or green color 25. Rules in using chalk boardLetters and drawing should be in large size and legibleAvoid spelling mistakeWriting should be in straight rowDo not use abbreviationWhile writing on the board , the teacher should ensurethat the class is attentive 26. Economical It makes theteaching aid student to heavily Captures student depend on teacherattention Makes chalk It can be used powder to inhaledagain and againby teacher Constant use of chalk board make it smooth and full of glare 27. Bulletin boardIt can be used for educational and informational purpose. It is asoft board which holds pins or tags and used for displayingmaterial 28. Principles in the use of bulletin boardA board for posting notices should be kept separate fromthose for current events and studyPlacement of bulletin board is to have one near theadministrators office , other near the library third onconference hall, fourth one is in class roomAppearance should be neat orderly and attractive mannerNotices should be removed as they have fulfilled the purposeCrowding of material should be avoided ,organized inattractive mannerBulletin board should be kept a little above the eye levels ofthe average individuals 29. Flannel boardThe rigid material covered with flannel cloth. The item to be displayedare pictures, or drawing 30. Magnetic chalk boardA magnetic chalk board is framed iron sheet carrying porcelaincoating .Magnetic chalk board can used to write with chalkstick , glass marking pencil, and to display pictures 31. 3-Dimensional aidsModelModels are the substitutes of real things . It can be made of clay, plaster ofParis, thermacole cloth, wood etc 32. Types of modelScale model: correct idea of an object can be displayedSimplified model : gives a idea about external form of objectWorking model : to demonstrate in a simple way of an operationor processCross section model :inside of an object is visible 33. specimenPart of a real object taken from natural setting.It shows the quality of structure . Eg :section oflung 34. Mock upIt emphasizes the functional relationship between device realityand its workability. Certain elements of original reality isemphasized to make it more meaning full eg :an artificial kidneyto demonstrate dialysis 35. moulageIt can be made up of plastic material to stimulatelife object 36. objectBrought from natural setting into class room that willmake the instruction more meaning full 37. Audio aids 38. RADIOCHARACTERISTICS OF AUDIO EXPERIENCEImmediacy : can describe the events as they happenEmotional impact :through the combined effect ofmusic , voice , and environmental sound studentsinterest can capturedOne way communication :no possibility of studentsfeed back 39. recording 40. advantagesRecording can be stopped at willRecording can play when we requiredIt can be used for introducing as well as summarizing thetopicTo evaluate the speech defect in ones own speechTo teach good pronunciation in foreign language 41. television 42. usesIt combines the sound and sight ,thus makes the experiencemore concrete, real, and immediateOffers uniformity in communication even the back benchfeels the pleasure of front row seatIt offers opportunity for seeing and listeningIt can teach large number of students at a timeIt provides excellent learning opportunity for both preservice and inservice education of teachersHelps to make the leisure time more interested 43. Activity aids 44. dramatizationMakes the class room instruction more livelyand interesting.Student get the opportunity for part