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In the current digital world, audiovisual aids have grown exponentially with multimedia such as educational DVDs, PowerPoint, television educational series, YouTube, and other online materials. The goal of audio-visual aids is to enhance the teacher's ability to present the lesson in a simple, effective, and easy to understand for the students.
Content such as text, images, links, and effects are added into each of the presentation programs to deliver useful, consolidated information to a group. Visual elements add to the effectiveness of a presentation and help emphasize the key points being made through the use of type, color, images/videos, graphs, layout, and transitions.
For example, PowerPoint now has an easy-to-use animation facility that, in the right hands, can produce very effective educational animations. Because animations can explicitly depict changes over time ( temporal changes), they seem ideally suited to the teaching of processes and procedures.
Presentation programs can either supplement or replace the use of older visual-aid technology, such as pamphlets, handouts, chalkboards, flip charts, posters, slides and overhead transparencies. Text, graphics, movies, and other objects are positioned on individual pages or "slides" or "foils" [ citation needed ] .
A graphic organizer, also known as a knowledge map, concept map, story map, cognitive organizer, advance organizer, or concept diagram, is a pedagogical tool that uses visual symbols to express knowledge and concepts through relationships between them. [1]
In 2003, he published a widely-read booklet titled The Cognitive Style of PowerPoint, revised in 2006. [19] Tufte found a number of problems with the "cognitive style" of PowerPoint, many of which he attributed to the standard default style templates: [19] PowerPoint's convenience for some presenters is costly to the content and the audience.
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