In fact, he's scared of all of his teachers.
He says they shout and are grumpy. He is terribly anxious about "doing something wrong" without realising, and being shouted at.He avoids asking a teacher for help for fear of being shouted at.
Now, what I see is an average bunch of teachers. His class teacher confesses to being a bit shouty, but she says "we're all human" and she also speaks affectionately to him.
He is 8, we are half way through his 2nd year at Junior school and it's not getting any better.
How can I help him not to be scared of his teachers?