> That's what it means to pass a student with a B, C, or an F. This is not quite the same thing as mastery of the subject, but it's a good proxy. Even an A stud

> That's what it means to pass a student with a B, C, or an F. This is not quite the same thing as mastery of the subject, but it's a good proxy. Even an A student will miss some stuff. Grade might be a proxy for mastery in some situations but it's likely not in the majority. Grade is more often than not a combination of mastery, ability to take tests, willingness to do homework and an accounting of how often you show up.