The course logs are a good tool for checking on how students are interacting with the course. The logs can be found under Administration > Reports > Logs. The logs tracks most every event within a course from logging in to Moodle, viewing a resource, submitting an assignment or taking a quiz.
The area highlighted at the top of the image filters that may be adjusted to show a particular activity, action, date, and/or course participant. This is a helpful and reliable tool when you are attempting to determine when students accessed Moodle, the course, and/or the resources and activities in a course. A teacher may look and see what a student has or has not done in a course.