I have my Canvas course set to drop the lowest test score, and I'm trying to figure out how it works with differing point total assignments. Someone on another thread said it drops the "lowest negative impact" score, but my grade book is showing some contradictory results.

One of my students has a 0/20 test and a 19/80 test. The 19/80 is being dropped; it has the most negative impact on the student's grade.

Seemingly in contradiction, another one of my students has a 0/20 and a 33/80, but the 0/20 is being dropped even though 33/80 has a greater negative impact.

For the first student, I tried increasing their grade little by little to see when it would drop the 0 instead of the large exam, and it dropped once it hit exactly 28/80. So it will drop a 27/80 over a 0/20, but it'll drop a 0/20 over a 28/80. This seems a little broken.

This is leading to inconsistency in how my students are scored. How can I address this issue?

Andrew,

Here are a couple of explanations from Support:

"This is actually working as intended. When you choose the drop the lowest score in Canvas, the system will choose the quizzes that have the most negative effect on the students score. Here is where you can find more information on Assignment Group Rules: https://community.canvaslms.com/docs/DOC-2626. How do I create rules for an assignment group? is another link so that you can see the paragraph at the top. The best way to determine this is by looking at the points each quiz is worth and seeing how each quiz affects the grade.

"It is designed to run all of the assignments through and and remove both points earned (numerator) and assignment points (denominator) from the assignment group total. It then decides which percentage would be most beneficial to the student and then drops the corresponding assignments to get the score."

So in short, it drops the score that gives up the most points for the student.

Robbie