Calculating Course Grades

The way you calculate grades is an expression of your values and goals related to the course material. It communicates to your students what is most important and how they should spend their effort.

Below are three basic models that teachers typically use to calculate grades. Also see To Curve or Not to Curve for a discussion about the advantages and disadvantages of curving.

Model 1: Weighted Letter Grades

Example:

Characteristics:

Assignments:40% 

Quizzes: 10%

Midterm: 20%

Final Project: 10%

Final Test: 20%

  • The teacher must decide the various kinds of performance and how they are valued.
  • Student performance in each category is kept separate from other categories.
  • Each category is averaged and then counted for a certain percentage of the total course grade. In our example, this means that students who perform well on quizzes will have a limited effect on their grade compared to students who do well on assignments.

Model 2: Accumulated Points

Example:

Characteristics:

92-100 points = A

85-91 points = B

76-84 points = C

69-75 points = D

68 points or below = F

  • To some extent, poor performance in one area can be compensated by work in other areas.
  • Poor performance early in the course is not necessarily crippling if the student performs well later on.
  • Conversely, if students perform well during the first three quarters of the class, their participation and work may decline near the end of the course.
  • This grading system allows students more control over where they put their effort in the course.

Model 3: Definitional System

Example:

To earn a particular course grade, a student must meet or exceed the standards for each category of work. If not all of the category expectations are met on the highest level, the student receives the grade for which all the category expectations are met.

Course Grade

 

Tests and Assignments

(graded work)

Labs

(pass/fail work)

A

A average

Pass for 90% of labs

B

B average

Pass for 80% of labs

C

C average

Pass for 70% of labs

D

D average

Pass for 60% of labs

If a student receives an A average in their graded work but only passes 80% of their labs, they would receive a course grade of B because that was the highest level at which they meet the standards for both categories.

 

Characteristics:

  • Each category of work is important and the teacher does not want the student compensating for it in other ways. For example, if the teacher values student preparation as being definitional for an A grade, this category can be used as a standard that must be met in order to earn an A grade.
  • This system must be carefully and thoroughly explained to students since it is not as common as other models. Explain to them that they are not being knocked down to their lowest grade, but instead they did not meet all the requirements to qualify for the higher grade.

 

Other Options

Penalties and Extra Credit

  • Penalties call the student’s attention to the seriousness of infractions and are best used in matters for which the teacher feels strongly or which carry a heavy penalty in the outside world.
  • Extra credit is useful when teachers want to let students compensate for failures in other areas.
  • Both of these options can be used with any model.

For help in planning, evaluating, or modifying assessments, contact Teaching & Learning Consultant Bryan Bradley at 801-422-8194 or bryan_bradley@byu.edu.

Reference: Walvoord, B.E., & Anderson, V.J. (1998).  Effective grading: A tool for learning and assessment.  San Francisco, CA:  Jossey-Bass Publishers