In the article, "Are Letter Grades Failing Our Students? which quote from the passage BEST supports the author's
central idea?
"letter grades..are supplemented by more frequent teacher feedback
focused on priorities."
"an increasing number of school systems have embraced such standards-
based grading and report cards.
"the best teachers and schools replace grades with narrative reports -
qualitative accounts of student performance."
"[Parents) became our strongest supporters because it gave them more and
better information