1
The main advantage of audio-visual materials
2
Main disadvantage of electronic audio-visual materials
3
Visual material used to represent concepts which cannot be brought as real objects into the classroom
4
Most widely used source of audio-visual materials such as films, series or documentaries
5
Programmes already made and prepared for students
6
Recorded auditory material similar to the radio
7
Authentic materials
8
Defined the concept of C.A.L.L.
