I just saw a clip of old German film (1950s?) showing a class of 10 year olds in a lesson. It was striking that the pupils stood up in their places to answer a question or read out what they’d written or make a contribution to discussion. I’ve often seen the same thing in American films. Colleagues point out that this was the practice in Russia, too – with the variation that the pupil addressed not the teacher at the front but the rest of the class.