• The 1930s introduced the [[Wikipedia:Audiovisual education|Audiovisual Instruction Movement]].  Some expressed concerns that radio would replace teachers and textbooks in classrooms. Radio and film, now with sound, however, proved to have little effect on teachers’ instructional practices.

• The 1930s introduced the [[Wikipedia:Audiovisual education|Audiovisual Instruction Movement]].  Some expressed concerns that radio would replace teachers and textbooks in classrooms. Radio and film, now with sound, however, proved to have little effect on teachers’ instructional practices.