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Where can third-grade students find free online classes for their children from TV, cable and TV channels?
China Education Television Channel 4.

The TV class is 12 hours a day, allowing students to choose freely and study independently as needed.

Cable TV, also called cable TV, developed from wireless TV and first appeared in Pennsylvania, USA. 1950. Cable TV still retains the broadcasting system and signal modulation mode of wireless TV, and does not change the basic performance of TV system.