Radios were introduced to classrooms, they had classroom instruction on radios like accounting, history, and arithmetic.
Overhead projectors were first used for military training but spread to schools quickly
Headphones became very popular and they were used to listen to audio tapes.
Scantrons came out, it is an automatic graded multiple choice test
They had one of these computers in a school
All schools had internet access.
Smart boards were introduced to schools.
1.5 million ipads were provided by schools.
90% of students under the age of 18 have access to mobile technology.