Question: What technology used to be how the school that Adelaide Miethke conducted classes?
Sentence (from "Adelaide Miethke"): Adelaide Laetitia "Addie" Miethke, {'1': ", '2': ", '3': ", '4': "} (8 June 1881 – 4 February 1962), was a South Australian educator and teacher who was pivotal in the formation of the School of the Air using the existing Royal Flying Doctor Service radio network.
Relevant evidence: Yes