Boy, 5, records teacher berating him in class

This really is NOT OK!

Do you know if your children have experienced this sort or emotional abuse at school?
Did you experience anything like this?
Many of us have, in my class, we were repeatedly told as a class, that we were all Thick, it was spelled out, T H I C K, then written on the blackboard in capital letters and exclamation marks!

Please share, to get this awareness out there.