Yuen-Teacher call outs

Something strange I've noticed in the classroom is that teachers call out their students in front of everyone about how they're doing academically. In the middle of class in front of everybody, they'll spend 5 minutes commenting about how one student is very bright and promising or how another student has gotten lazy in their school work and just failed a test or something and then call out another student about specific grades they had received. In all my schooling in the U.S, teachers would never call out students in front of the entire class about their academic performance or specific grades. It's not good or bad, it's just something different that I've noticed many different teachers do here. I am curious to know if this is something normal that happens in all the schools around the area and if it reflects a difference in teaching philosophy in general compared to the general teaching philosophy and approach of the U.S.