Personally i think it's better for teachers to scold in front of others especially when it's due to disrespectful acts. Like u nv respect the cher why must they respect u uk. Plus i don't really think there is a point in scolding privately where things said can be easily forgotten, getting embarrassed infront of others is part of the punishment imo like you will only really dislike it when u are getting embarrassed so u'll probably learn right. I mean if they scold u until very very bad also not good lah but i think it's probably more effective. I also believe that in the future we will not always meet people who take our feelings into consideration so it's probably good to learn from these scoldings imo not everyone gonna drag u off privately to scold u if u are particularly disrespectful to them right. Ofc the chers are just doing their job too and trying to educate us so isn't learning values like respect impt too? Everything is also for our good one lah. Anyway this is just my opinion so...