It could be a Zen koan: if everybody in the class gets an A, what does an A mean?

The answer: Not what it should, says Andrew Perrin, a sociologist at the University of North Carolina, Chapel Hill. “An A should mean outstanding work; it should not be the default grade,” Mr. Perrin said. “If everyone gets an A for adequate completion of tasks, it cripples our ability to recognize exemplary scholarship.”

As part of the university’s long effort to clarify what grades really mean, Mr. Perrin now leads a committee that is working with the registrar on plans to add extra information — probably median grades, and perhaps more — to transcripts. In addition, they expect to post further statistics providing context online and give instructors data on how their grading compares with their colleagues’.

“It’s going to be modest and nowhere near enough to correct