I no longer grade my students’ work, and I wish I had stopped sooner
> <i>For example, students who come into a course with little prior knowledge earn lower grades at the start, which means they get a lower final average, even if they ultimately master the material.</i><p>I'm not sure this is the <i>worst</i> flaw with grading (the equity issues may be worse), but it's certainly the <i>dumbest</i> flaw. A scoring system for scholastic ability that disadvantages those that <i>start off</i> with little knowledge, even when they do well by the end of the course, is ridiculous on its face.