Studetnes don't grade their teachers here. Only professionals are allowed to grade teachers.

Correction: A "B student" means a very good student, but not an excellent one. What about a "B"grade teacher? What does a "B teacher " mean? What will he say to you when you grade him? Are you talking about student online assessment of teachers? A "B" grade for a teacher means the same as for a B student. As these surveys are anonymous your teacher won't find out it's you. Don't worry.

Oh I see, you are asking how to write a report about a teacher whom you'd rate as "B" You could say something like: Title: Report for teacher X Grade: B Mr/Mrs/Miss X is punctual to class and is usually well prepared. His grammar and written comprehension lessons are explained in a patient manner. Literature lessons are interesting and he often shows us DVDS after we have read the novels. That way we become more interested in the characters. However, a more thorough explanation about the theme and plot would be useful . Mr X always sets homework but sometimes forgets to collect it. It would be helpful for the students to get prompt feed back. Overall, Mr X is a very good teacher and his pupils like attending his classes.

Then the B teacher is a good one as well ;) You can assess and express your opinion about your teacher frankly without being insolent . If you want to criticize him/her ,then in a polite neat way .

lol very funny... all I know is I kind of like B... movies.