audio visual instruction movement and instructional radio (4h 59min, sep 21, 1920 y – 11h 32min, jul 9, 1930 y)
Description:
professionals in ID&T realize that the value of audio visual materials is its ability to present concepts in a concrete manner
Added to timeline:
Date:
4h 59min, sep 21, 1920 y
11h 32min, jul 9, 1930 y
~ 9 years and 9 months