You can use the Gradebook to curve grades for an assignment. In the academic community, curving grades is advisable if only a certain number of students can pass, or when you require a fixed distribution of grades distributed throughout the class.

To curve grades, Perceivant asks for an average curve score and then adjusts the scores as a bell curve 66% around the average score. For instance, if the average score is the equivalent of a C, Perceivant would distribute mostly C- and C+ scores, distributing outward down the curve to Bs and Ds, and then ultimately As and Fs. This type of scoring creates a predictable distribution, but it means that students will compete against their classmates for scoring.

**Note**:

- Grade curving cannot be undone. Pre-curved grade histories will be available, but the curving action is irreversible.
- Student grades will be impacted differently based on where they are in the distribution of scores. Perfect scores will not be affected by curving grades.
- When Multiple Grading Periods are enabled in a course, you cannot set a default grade for any assignment that has at least one student in a closed grading period.

## Set Curve Score

In the **Average Score** field [1], type the average grade for the curve score. The graph above the Average Score field will change depending on what score is entered and give you an approximation of what the new scores would look like [2]. You can adjust the average score as necessary to produce a desired grading outcome.

You can assign zeros to students who did not submit their assignments by clicking the **Assign zeroes to unsubmitted students** checkbox [3]. To curve grades, click the **Curve Grades** button [4].

**Note**:

- Grade curving cannot be undone. Pre-curved grade histories will be available, but the curving action is irreversible.
- Student grades will be impacted differently based on where they are in the distribution of scores.

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