Hum... Brazil is borrowing the tried and tested ideas of education over radio and TV for remote instruction in rural areas.

At the same time, everybody is trying as hard as they can to stop needing them. That's because those techs suck. It is much easier to learn when you have any bit of interactivity, the more interactivity, the easier it is. Broadcast and postage are just not suitable.

School of the air is not broadcast radio, it is ham radio which is interactive.

We who? Anyone who has the Internet can use YouTube and Khan Academy and Zoom for a far better experience than SoA. Anyone else can use SoA.