The development of modern educational technology in China began in the 1920s, which is called audio-visual education. At that time, slides, movies and other media used in audio-visual education activities, compared with the initial oral knowledge and later printed media, were used in teaching, and their communication mode jumped a big step, belonging to the category of modern educational technology, but it was not a complete modern educational technology, but only the initial stage of the development of modern educational technology.
The state formulates relevant policies to ensure the development and popularization of audio-visual education. Every semester, schools charge students a fixed fee to buy audio-visual software, and must buy audio-visual products issued and filed by the provincial audio-visual museum.
The provincial library will uniformly print the products approved to participate in the subscription of audio-visual education in this issue into a catalogue (now mostly in electronic version) for easy distribution.
Educational software development companies can contact provincial audio-visual education centers before subscribing and submit their products for review. The approved products will appear in the audio-visual education procurement catalogue submitted to provinces and regions, and then distributed to cities, districts and counties, and then to schools. After the school selects the products, it returns to the provincial library from bottom to top and issues the orders directly.
Every company's products have to pay a certain evaluation fee before they can be included in the provincial catalogue, and they must pass the examination and approval. Products not listed in the catalogue shall not flow into the schools of all districts and counties in the form of direct orders (the lower-level districts and counties or schools directly place orders with merchants without going through the provincial museum).
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