When assigning the B+, the professor used a process called "norming".
Calculating norm-referenced scores is called the “norming process,” and the examination group is known as the "norming group."
Norm-referenced alludes to government sanctioned tests that are intended to analyze and rank test takers in connection to each other. Norm-referenced scores are for the most part detailed as a rate or percentile positioning. Norming groups ordinarily involve just a little subset of past test takers, not all or even most past test takers.