Last week 10 online teachers sat in R-H spitting: they don't like this, don't like that. Then we've fixed what we've learned, now we're more ready for the next take. One thing R-H can other like Zoom&co cannot: we can switch on any student's camera, then switch it off. This is more like in real life than zoom with 100 small videos. Only teacher has all class attention on his video, while students don't see each other. Teacher asks a question then up anyone's camera to get the answer. Student can put up a request to give an answer with a bell, or put it down.