This one is a doozy? Student Submissions disappeared after we imported some items - Help?

[alycea]

Ok - we've been using Canvas for years and I have not seen this.

We had a course that needed some additional items.

Our students had completed through week 26 (it's a 30 week course).
All the check marks and submissions were present.
We have a required order of submissions so they MUST complete each assignment to move forward.

We imported a question bank and a few quizzes and *poof* - a whole bunch of submissions as far back as week 20 - just vanished. 

Again - since they must complete each assignment in order to move forward - there is NO way they could have been at week 26 without having completed all of the submissions. 

Sooooo.. I've checked everything I can think of but our student has to go back to week 20 and randomly re-do work she has already done. It's just........gone. A bunch of assignments.

I have literally no clue what to do. When we dig in to the analytics, logs and gradebooks - there is no evidence she ever did the submissions - BUT she must have in order to have moved forward all the way for a full six weeks.

I'm stumped. Attaching an image to show how some assignments no longer show a check mark... randomly.

[Snoeyink]

A suggestion: see if Student Analysis reports still have records of what was submitted.
I had a similar instance recently where a TA edited the exam Quiz to give one student an extension by changing "Assign to" from "Everyone" to the individual student and updating the deadline.  All 54 completed exams disappeared. Downloading CSV from Student Analysis showed that the submissions were still stored (and I immediately kept a copy).  When I realized what he had done, I added back Everybody and the original deadline and everything re-appeared. 
So, check if the Student Analysis report has data for the missing submissions, and if so, suspect that the updating questions reset the Assign to of the first missing one, or, more likely, invalidated the completion of the quiz just before the first missing one. If you can reset the due date, or that that students have in fact completed, then the missing submissions may re-appear.  

[gnoack]

Have you check the gradebook history? 

https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-view-the-history-of-all-grading-changes...