Educational Technology 1 Lesson 14 Maximizing the Use of Overhead Projector and the Chalkboard

1. Lesson 14
Maximizing the Use of the
Overhead Projector and
Chalkboard
Lesson 14
Reporter: Alvin D. Solomon

3. it is a surface on
which markings
made with chalk are
visible.
it is also
called blackboard or
greenboard. A
surface use to
write on.

4. Practices for Effective Use of
Chalkboard
1. Write clearly and legibly on the
board.
2. It help if you have a hard copy of
your chalkboard diagram
or outline.
3. Don't crowd your notes on the
board.
4. Make use of colored chalk to
highlight key points.

5. Practices for Effective Use of
Chalkboard
5. Do not turn your back to your class
while you are writing on the
chalkboard.
6. Start to write from the left side of
the board going right.
7. Provides the lines for your board.
Practices for Effective Use of
Chalkboard
5. Do not turn your back to your class
while you are writing on the chalkboard.
6. Start to write from the left side of the
board going right.
7. Provides the lines for your board.

6. Practices for Effective Use of
Chalkboard
8. Look at your board work from all corners
of the room to test if students from all
sides of the room can read your board
work.
9. If there is a glare on the chalkboard at
certain times of the day, use the curtain of
the window.

7. Practices for Effective Use of
Chalkboard
11. If you need to have a board work in
advance for tomorrow's use, write "please
save" and cover it with a curtain.
12. Make full use of the chalkboard.
10. Mount the chalkboard a little concave
from left to right to avoid glare for the
students benefits.

8. Chalkboard Techniques
by James W. Brown (1969)
A. Sharpen your chalk to get good line
quality.B. Stand with your elbow high. Move
along as you write.
C. Use dot as "aiming points". This keeps
writing level.
D. Make all writing or printing
between 2and 4 inches high for
legibility.E. Use soft chalk so that it can be
erased easily.

9. - a projector that projects on to a
screen or surface the image on a
transparency placed over the
projector's light source,
with the image
redirected by
an overhead
mirror.

10. Advantages of Overhead Projector
By Brown (1969)
- it is simple to operate.
- instructor has the complete control of
sequence, timing, and manipulation of this
material.
- instructor is facing the whole class, keeping
the eye contact instead of turning around
and write.
- images can be enlarge for all the
audience to see.

11. - instructor may point, or some
indication to facilitate
communication.
- the projection surface is large allowing the
teacher to show his/her prepared
transparencies on the screen.
- easy to create materials for use in the
overhead projector.
- there is an increasing number of high-
quality commercial transparencies.

12. -show pictures and diagrams,
using pointer on the
transparency to direct
attention to a detail.
- use felt pen or wax-based pencil to
add details during projection.
- control the rate of presenting
information by covering a
transparency with a sheet of paper.
This is known as progressive
disclosure technique.
Overhead Projector Techniques
by James W. Brown (1969)

13. Prev
Overhead Projector Techniques
by James W. Brown (1969)
-place additional
transparency
sheets as overlays on base
transparency separate
process and complex ideas
into elements and present them
in step-by-step order.
- show three dimensional
objects from the
stage of the projector.

14. Overhead Projector Techniques
by James W. Brown (1969)
- move over lays
back and forth to
rearrange elements of
diagrams.
- simulate motion on parts
of the transparency by using
polaroid glass to polarized light.
- simultaneously project on adjacent
screen other visual materials usually
slides or motion pictures.
Prev

15. Other reminders on the effective use
of the OHP :
-stand off the side of the
side of the OHP while you
face the students.
- face the students when
you talk not the screen.

16. Other reminders on the effective use
of the OHP :
Prev
- place the OHP to your right,
if you are right handed, and
left if you are left handed.
- place the OHP on the table low
enough so that it does not
block you or the screen.

17. Prev
Other reminders on the effective use
of the OHP :
- tilted the top of the
screen towards OHP to
prevent keystone effect.
- AVOID mistake of
including too much
detail on each image.
- AVOID large tables of
figures. Come up with
graphic presentation.

18. Prev
Other reminders on the effective use
of the OHP :
- DON'T READ the text
on your slide.
- AVOID too much text.
- your presentation
must be readable from
a far.

19. students themes or writing exercises can be
reproduce in films by means of the heat or
photocopy process
Brown(1969) enumerates effective
practices and experiences from others:
simple objects (i.e. keys, leaves, cut out paper
shapes) can be placed directly on the projector
Primary grades
English composition lessons

20. Brown(1969) enumerates effective
practices and experiences from others:
two-and three- dimensional diagrams can be
built up gradually with carefully prepared
transparencies involving color and separate
overlays.
blank sheets of acetate and grease pencils can be
given to selected students.
Arithmetic
Geometry and Trigonometry

21. Brown(1969) enumerates effective
practices and experiences from others:
the secretary can use a cellophane roll
(accompanying most projectors) or blank
acetate sheets.
plays and game procedures may be analyzed
P.E and Team Training
Homeroom Activities

22. Brown(1969) enumerates effective
practices and experiences from others:
a teacher can sketch on clear plastic with a felt
pen.
a picture-transfer transparency can be made
from a magazine picture.
Primary Reading Class
Art Class

23. Brown(1969) enumerates effective
practices and experiences from others:
all types of maps can be enlarged after accurate
but easy preparation. Overlays show key facts
about particular regions.
Social studies
iron filings dusted on a clear plastic sheet over a
permanent magnet can be projected clearly to
illustrate lines of force.
Science

24. Progressive Disclosure Technique can
be achieve:
Placing a sheet of paper over the transparency
and moving it down to expose succeeding lines
of type.
Attaching strips of opaque paper to the aides of
the mask

25. Progressive Disclosure Technique can be
achieve:
Placing over the transparency an opaque sheet
containing a cutout slit