That's very much true. I remember very clearly that when I was a new 1st grade student in a poor southeast asian country that the kid that yelled back at my tea

That's very much true. I remember very clearly that when I was a new 1st grade student in a poor southeast asian country that the kid that yelled back at my teacher in my 60-person class didn't come back next week, whereas I suspect the same would not fly in US public schools. The things I've read (threatening violence, etc) would've never happened in my home country's schools, and if it did would've led to corporal punishment (caning was regularly practiced) and expulsion, not necessarily in that order, and very quickly at that. My impression is also that the academic culture is very different - even in my poorly funded primary school full of poor kids, there was a sense of academic accomplishment being of the highest importance -- all the students knew the importance of good grades, and students that disagree were socially shunned. Smart kids were the popular kids, and the people who ranked the top 10% got into a special class and were widely admired.