Creating a Test or Quiz with Optional or Extra Credit Questions

When creating a Moodle quiz or test, it is possible to set a value for the total quiz points that differs from the sum of the individual question points. However, doing so will scale each of the individual question's points, and therefore can't be used by itself to set a value lower than the sum of points to allow for extra credit. In order to achieve this, a setting in the gradebook must be adjusted in order to compensate for the scaling.

Setting up the quiz points

To begin, set up the quiz as normal, assigning each question the actual points you want it to have, including for the extra credit questions (for variable points possible for an extra credit question, enter the maximum points possible). By default, Moodle will sum up the total of all the questions and enter that in the Maximum points field at the top right of the quiz editing page.

Screen capture of Moodle quiz editing page, showing Maximum points field and several questions

Once your quiz is complete, adjust the Maximum points to reflect the total points minus the extra credit points (in the following example, there are 4 extra credit points possible, so 101 - 4 = 97.) and save the quiz.

Screen capture of Moodle quiz editing page showing differing Maximum grade and total of marks.

Rescaling individual point values

At this point, the quiz is set to scale each of the individual questions by the ratio of Maximum grade/Total of marks, or 97/101 or 0.96. In order to maintain the maximum grade of 97, but keep each question point total as defined, it is necessary to scale each question back up. To do so, go to the gradebook setup (from the side menu Grades and then select the Setup tab), and select the Edit link to the right of the quiz and click on Edit settings from the drop-down menu.

Screen capture of Moodle gradebook setup page showing a quiz and the Edit drop-down menu displaying Edit settings.

From the Edit grade item page, click on the Show more... link to expand the Grade item section.

Screen capture of Moodle gradebook item settings page with arrow highlighting the Show more... link

In the expanded Grade item section, there is a Multiplicator field, which serves to scale, or multiply, each grade item by a set factor. In this field, you will enter the inverse of the amount that the quiz is being scaled down because of the lesser total of the Maximum grade than the Total of marks = Total of marks/Maximum grade. In the example case, this would be 101/97 , or 1.0412. With this number in the Multiplicator field, each question value will be multiplied up back to the original value, but the maximum points will remain as set in the quiz settings, allowing for more total points available than the Maximum grade. Save these settings and you are done! The correct grade will now appear in the gradebook. See below for important notes about how the grades and points are reported to students and instructors.

Screen capture of Moodle gradebook Edit grade item page with arrow highlighting the Multiplicator field in the Grade item section.

Important notes about viewing totals

It is important to note that the scaling down and scaling up necessary to make the extra credit points work correctly will result in the correct percentage or score to be reported in the gradebook for both students and teachers. However, the display of scores that students see when returning to the quiz, or that teachers see when selecting View attempts from the quiz page will not show the correctly calculated percentage. A teacher will see scaled down values for each of the questions (along with a green check for correct, and a red X for incorrect/partially correct answers), as well as for the total which is displayed in the column Grade/Maximum grade (in the above example Grade/97.00). These numbers should be ignored, as they do not reflect the actual/recalculated points.

Students will see two different scores. The first is the total rescaled points (ie actual points as entered in the quiz settings) out of theTotal of marks (unscaled). In our example, this is the total possible out of 101. The second score is the scaled grade out of the Maximum grade possible, here the scaled total out of 97. There is also a report of the "final grade"  reflecting the amounts in the second score. It will be important to inform students that they need to refer to the gradebook score, OR take their grade as the Marks reported divided not by the total marks possible, but by the Maximum grade shown in the second column.

Screen capture of Moodle quiz summary page for student showing Marks out of total possible and Grade out of maximum grade possible

 

Details

Article ID: 117591
Created
Mon 10/5/20 12:04 PM
Modified
Tue 10/6/20 12:09 PM