I have seen this post done by a number of bloggers I read and love and found it interesting and also challenging.
I am an English teacher in Bucharest, the capital of Romania and I teach high school students (grades 9 to 12). I also taught gymnasium students (grades 5 to 8).
This is my personal opinion and my own experience!
What is good for me can be not so good for you!
Since I am a teacher I will grade according to the American grading:
grade A R