Place the projection screen
in the darker corner in front of the classroom,
or ensure that incoming light does not reflect on to the
screen. In a proper set up only one curtain needs to be
closed on a sunny day |
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The bigger the screen the better
(1.20 metre x 1.20 metre is advised). A white painted square
on the wall also serves very well as a projection screen.
Try to have overhead projectors and screens installed in
most classrooms to facilitate regular use. If projected
onto a relatively small (electronic) whiteboard the large
image effect might be lost - installing an additional big
screen is worthwhile. |
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Place the overhead projector directly
on your desk - or better still, sunk into your
desk off-centre so that you can annotate your presentation without
blocking the projection. Alternatively, the OHP may be mounted
on a trolley: it can be pushed into a corner when not in use and
remains accessible. |
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The image is projected over your
shoulder.You
keep facing your class; it is easy to write or draw (with washable
ink) on the transparency or to cover some parts not being dealt
with at that particular moment. |
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You remain in eye contact with the
students and monitor the level of engagement.
This work situation is especially effective for inexperienced
teachers as it helps maintain class management simultaneously
with lesson presentation. |
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Ensure that the transparencies are
within easy reach for direct use. Also, keep your
self-designed transparencies arranged in the correct sequence. |
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Use an overhead projector with a
strong lamp: 250 watt OHPs were common in the
last century but 400watts is highly recommended now . The higher
wattage provides greater contrast, deeper colours and more legible
text. Presentations are much more vivid and remain visible even
in sunlight. |
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