School of the Air is the term used for correspondence schools catering to the primary and early secondary education of children in remote and outback Australia. Some or all of the classes were traditionally conducted by radio.
The "school" leveraged the radio network established by Reverend John Flynn as part of the Royal Flying Doctor Service. This network was powered by another great Australian innovation – Alfred Traeger's pedal-powered radio 
.
The first lesson was broadcast in 1948 from the Alice Springs RFDS base. A few years later, the School of the Air (SOA) was officially established
It's important to note that the technology adopted and developed was two way radio, so rather than passively listen to a teacher, students were able to interact with peers and the teacher.
There's another piece of this story.
When the Australian curriculum was rolled out in 2012, Education Queensland (EQ) asked a group of teachers to create a guide for parents whose children were receiving remote education through their program called Schools of Distant Education (SDE). This guide broke the curriculum down by year and by subject.
EQ was so impressed by this guide that they then asked those educators to expand it for teachers who were new to the professions, calling it Curriculum to the Classroom (C2C) that defined the delivery of the curriculum down to a day-by-day script for each term.
EQ then released the C2C to all of the schools in Queensland with the implied expectation that this very structured approach to curriculum delivery was to be the standard by which all teachers should be operating, thus completely eliminating any teacher agency. Later, they backed down from this expectation but the damage continues to this day.