1. Home science Extension III B.Sc Home Science V Semester By
Presentation On
Home science Extension
III B.Sc Home Science
V Semester By
Dr.T.Mamatha, M.sc. Ph.D
Lecturer in Home Science
D.K.Govt.college For Women
Nellore.

2. Audio-visual aids

3. DEFINITIONS
A visual aid is an instructional or communicating device in which the message can be seen but not heard
A audio aid is an instrumental in which the message can heard but not seen
A audio-visual aid is an instrumental device in which the message cab be heard as well as seen

4. Audio aids
radio

5. RECORDING
Disc
Tape
Wire

6. Visual aids
Flannel graphs
Illustrations

7. FLASH CARDS
CHARTS

8. PHOTOGRAPHS
POSTERS

9. Back board
Bulletin board

10. Audio –visual aids
television
Puppet shows
Drama shows

11. Factors influencing selection of Audio –Visual Aids

12. FACTORS INFLUENCING AUDIO-VISUAL AIDS
Audio and visual aids are used singly or in combination , taking following factors in consideration
The teaching objective i.e; the type oh behaviour change you want to bring about gaining information ,or changing attitude or learning some skill
The nature of subject matter being taught
The nature of audience –age ,level ,education level , interest ,experience ,knowledge of the subject ,intelligence

13. The size of audience :eg Flash cards can be used for a small audience only; motion picture ,f or a large audience
Relative cost of the various aids-effective aids need not necessarily be expensive
The teacher -1 The extension workers familiarity with and skill in using the several aids 2.his orginality and skill in selection preparation and use of aids
The availability-an effective extension worker makes use of indigenous materials, when the teaching aid he would like to use is not available

14. Effective use of AUDIO-VISUAL AIDS

15. Planning It is know clearly the objective of the presentation
plan well in advance , this help anticipate problems and avoid them
Anticipate size of audience as closely as possible and make sure the aids are visible and or audible to the entire audience
Plan for the use of a variety of colourful visual aids.They help change the place of presentation and help hold audience interest
Determine the appropriate timing for the presentation

16. Prepartaion
Prepare by rehearsing or previewing in order to make a smooth presentation
Select a convenient and as comfortable a meeting place as possible with acoustics and seating arrangements suited to the specific purpose
Anticipate need for special lighting or for total darkness and be prepared to provide either at the right time
Make sure that all equipment is in good working order before starting the meeting
Arrange the audio visual aids in sequence and have them within easy reach
Keep aids out of sight until actually required for use

17. presentation Present aids at the right moment and in proper sequence
Motivate the audience and stress the key points they should observe during the presentation
Present aids at the right moment and in proper sequence
Display only one aid at a time
Remove all unrelated material
Stand beside the aid ,not in front of it
speak facing the audience and not the aids

18. Evaluation
In the end evaluated by providing for discussion and application to discover and dispel misunderstanding,if any
Undertaken follow –up studies and observe results

19. and Demerits of Audio Visual Aids

20. Merits of audio-visual aids
The learner to learn faster, more thoroughly,r emember longer
The teacher to organiser his teaching material in a systematic order
Clarify ideas being presented
Impress ideas more indelibly on the mind
Vitalise and make teaching more real
Picture experience outside one’s own environment
Combat verbalism or unneccessary of meaningless from of words
Overcome the language barrier
Attract and hold attention
Change attitude or point of view
Save time they make learning faster n easier

21. visual Demerits of audio aids
Learners may sometimes from mistaken or distorted impressions, unless audio-visuals are supplemented with rerquired explanation
Temptation for the teacher to narrow down his teaching to only a few big ideas not giving the complete picture of a subject
Some teachers acquire the mistaken idea that mistaken idea that they have little to do when audio-visual are used
Possible risk of spectatorism instead of the attitude of thoughtful enquire

22. Models are essentially recognizable imitation or replicable of the origin wehether workable or not or not , differ or not
Eg compost pit or cattleshes or soil convertion project
A mock up differ from the model in that it is a functional device which alters the essential elements that are being studied in the original and concentrates on these elements only to the exclusion of other
eg ; operation mock up of cylinder and piston of a diesel engine
Real objectives taken out of their natural setting
eg specimens of crop shown at a meeting or exhibition , preserved or mounted specimens of insects , plants etc
Objects pieces of reality or sample ear heads, diseased parts of plants