Teacher Discussion Forums

I noticed an excellent example that my former teacher at the University of California, Irvine used to do in her assesment of our performance. She used to give us projects like presentations and while we are presenting our activities she used to video our presentations . At home she watches the video...

I have always a question in my mind. It is all about pronunciation . Is it a must that the student pronounce the words exactly like native speakers of the target lanuage ? and is it acceptable to have pronunciation using the mother tongue ?

I need your help .

Thanks