The grading system is a powerful resource for teachers In their book Effective Grading. A Tool for Learning and Assessment, Barbara Walvoord and Virginia Anderson state that "teachers must manage the power and complexity of the grading system" and that "teachers must consider grading in their first deliberations about a course $"$

Based on Barbara E$.$ Walvoord and Virginia Johnson Anderson, Effective Grading A Tool for Learning and Assessment, Jossey$-$Bass: San Francisco, $1998,$ pp$.$ xvil$-$xviii.

a$.$ The grading system used by a teacher can affect the incentives of students to learn the course material

A$.$ by altering the payofis to achieving success on the various components of the course.

B$.$ without using anything since student performance is based on innate intelligence.

C$.$ by doubling the points assigned to each component of the course

D$.$ by uniformly weighting all course components.

b$.$ If teachers put too much weight in the grading scale on a certain part of the course, like readings outside the textbook, students might respond by other parts of the course grade weight assigned to being prepared.