how to preapre av aids

How to Prepare

Audio-Visual (AV) Aidsin Teaching Learning (TL) process

Mr. Mohammad Mukhit Kazi, Assistant Prof Microbiology SDCH Pune

Objectives

• To Enumerate the principles of using AV aids in TL methods

• To enumerate the different media and to understand the salient attributes of each medium

• To be able to use AV aids appropriately • To appreciate that AV aids should be used only

as much as needed


Introduction

• AV aids are the media that are used as tools and technologies which facilitate the teaching learning process

• Basic principles– Links– Intelligibility– General style– Highlighting– Targeting


Why Audiovisual Aids?

I hear, I forgetI see, I rememberI do, I understand (Edwards and Mercer)

• Visual perception contributes to about 90% to all human learning.

• Maximum attention span of an adult learner is 20 min


Audio-visual Aids

It is a Medium

It MEDIATES


Audio-visual Aids

Choice of Medium

APPROPRIATE not just AVAILABLE


Effective use of Blackboard

• Write key points• Use std abbreviations• Write in large letters• Use different color chalks• Do not talk while writing• Use maximum space• At the end clean the board

Mr. Mohammad Mukhit Kazi, Assistant Professor Microbiology SDCH Pune

Advantage of Blackboard

• Readily available• No Electricity required• Sequential development of concept can be

done effectively• Minimum expenditure• Easy to use• No need to keep darkness in the room


Disadvantage of Blackboard

• Eye to eye contact is lost while writing• The written material cannot be stored• Advance preparation of material is not

possible


Overhead projector

• Lettering style should be simple• Avoid spelling mistakes• Font size should be 0.5 to 0.7 cm for hand

written and printing 18 points• Use combination of capital and small letters• Line should be restricted to 7 to 10• Colors can be used• Use pointer and allow time to read


Overhead projector

• The projector is simple to use• Can be used in almost ay training room which

has electricity• Can be used in classroom lights on• Can be prepared in advance• Relatively inexpensive


Disadvantage of Overhead projector

• Electricity is required


Power Point


Using Power Point Slides

• Practice with equipment• Slides should be concurrent with verbal

content• Pause to allow audience to redirect attention• Talk to audience/don’t read slides• Explain graphics• Use verbal cues for next slide


Using Power Point Slides

• Total number of slides = 1/2 number of minutes in presentation

• One topic per slide• 3-7 bullets/slide• Key words • 32 point for text/ 40 point for headings


Audiovisual Errors

0

10

20

30

40

50

60

70

80

90

1st Q tr 2nd Q tr 3rd Q tr 4th Q tr

EastWestNorth

• this font is way too small• don’t try to put too much on one

slide• don’t have to apologize• there is just too much here to read

and what is here is too small to see, anyway

• can you even tell which color is which on the bar graph? I can’t because they are too similar.


Audiovisual Errors

• Use “special effects” sparingly

• They rarely add anything to the presentation

• And can be extremely annoying and distracting!


Font Errors: Selection

funky fonts are distracting and hard to read

this is a sans serif font (Arial)

this is a serif font


Font Errors: Size too small is hard to see, and this is smaller that the minimum resolvable acuity for

most of the audience

• beyond minimum resolvable acuity• make big enough to see easily


Font Size

• titles - 40 to 72 pt

• text - 28 to 40 pt

• NEVER smaller than 28 pt


Font Errors: Case Selection

ALL CAPS IS NOT VERY READABLE FOR LONG PASSAGES; AVOID THIS EXCEPT FOR SHORT TITLES AND ABBREVIATIONS

Sentence case is much more readable!


Font Errors: Alignment

This passage is more difficult for you to read because it is centered, instead of

left justified. Don’t do this.

This passage is left justified and easier for you to read.

Do this.


Font Colors

• chromatic aberration of the eye causes different colors in the slide to appear to be at different depths; and makes it hard to read

don’t do it!


Avoid this.

This section has lower contrast than what comes next and is harder to read

Do this.White on black is easy to see.

That’s why it is used in low vision apps.


Busy backgrounds are distracting

• all the stuff distracts you from my message and the picture

• you are having trouble seeing this

• keep it simple


Simple backgrounds

• not distracting• text easier to read


Examples of PowerPoint


ELISA test


Elek’s Gel precipitation


Elek’s Gel precipitation

Known non toxigenic Strain

Test Strain +ve

Test Strain -ve

Known toxigenic Strain

Line of precipitate


Thank you so much


how to preapre av aids

Education