There is little empirical evidence, however, about the potential impact of these alternate approaches on current evaluation systems. (cepa.stanford.edu)
Current evaluation metrics look at the basics of language skills such as spelling, proper grammar, etc. which don't always translate well * pun - intended * in a conversational setting. (elearningindustry.com)
Current evaluation systems tend to overlook many bad teachers and yet classify many good teachers as bad ones. (educationbythenumbers.org)