Hello Dr. Bauroth,
Thank you for your post.
Unfortunately, it is not currently possible to view the amount of time spent on each question/assignment. However, you can access submission datetime stamps for each attempt through SpeedGrader. Open SpeedGrader for a particular assignment, then select a student's name in the upper-right corner drop-down. From there, click on one of the question tiles. Click 'Show Attempt History' in the upper-left corner of the question.
You can also see the amount of total time spent in the course, and last login activity, through the People menu on the left.
I hope this helps. Please let me know if you have any questions. Have a great day!
Yes, Thank you!