I am not a dude or dudette..
I have graduated from English Teaching B.A Program (a four-year faculty).
According to this faculty,the first two years of the education takes place in the clasroom conditions.In the second phase of the education,I mean the last two years,students have to study at home and join the exams in a pre-programmed day.
Students have been taught the professional knowledge about how to teach English.The knowledge changes from lesson to lesson.
PS intelligibility problems may occur between natives and non-natives in both spoken and written language