1. Overlay
Transparencies

7. ADVANTAGES:
 It is simple to operate.
 Therate of presentation can be
controlled by the teacher.
 Itis usually placed in front of the
classroom, therefore the teacher can
still face his/her students.

8.  It can be used in a large groups.
 Transparenciescan be prepared
through a variety of
simple, inexpensive methods.
 It is effective in a well-lighted room.

9. LIMITATIONS:
 It
requires electricity and special
equipment.
 OHPs are heavy and bulky to
transport.
 Framed transparencies are bulky and
difficult to store.

10.  It is instructor dependent.
 It
requires preparation since
nontransparent material cannot be
projected.