From your course page, click Reports
Choose Logs from the list
Choose the student and date you want to look at
Click the Get these logs button
The log report will tell you the date and time in which a student was active
In the same information row, the log will describe the action that took place, e.g., viewed, submitted, etc. Below you can see the student uploaded a file and viewed an activity
You can also review data about class participation in a particular assignment. Below are the results for student activity in the Herd Immunity assignment over a period of two weeks
By selecting Activity completion using the same dropdown menu, you can get an overview of activity completion for the entire class
Remember also that the Accessibility outline report from the same menu can show you activity areas that need improvement - such as adding alt text or improving color contrast