Well, this discussion has been going on for a while now. I just want to draw your(Lan) attention to some personal observation I have had as a school Administrator.

I have had several foriegn teachers from the so to say native speaking countries . Presently , I have 8 foreign teachers. I have found out the blacks among them are very Active in the class compare to the whites .

They are so eager to learn new ideas . So they are always improving. The three, native speakes are from The USA, Australia and Canada respectively. I think these guys are just fortunate they are native speakers .Really, they have no good lessons to offer . I eventullay fired two of them ( Canada and The State) Then the other guy from Australia is on probation.

Mean while I have been enjoying the services of my African teachers. They have brought a lot of popularity to my school, not just because they are good teachers but they are very friendly.

If errors made by writing are ways to measure a good teacher, then i doubt you will be one, you have also made so many mistakes in your response to Goto .