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The International Journal of the Royal Society of Thailand
Volume XII, 2020
Another teaching aid to assist instruction during Thai Language 3.0
was the overhead projector. Lessons could be prepared ahead of time on
transparent sheets and projected on screen. While the teachers had more time
for explanation and discussion, students still used the same old technology of
copying into their workbooks.
Figure 19 Overhead Projector
(https://en.wikipedia.org/wiki/Overhead_projector)
Then came software like Power Point that was introduced to manage
the teaching slides.
Figure 20 Powerpoint
(http://speakingppt.com/2011/06/08/powerpoint-templates-for-business-
presentations-part-1-of-2/)
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