Many students do not care. A lot of time is spent wondering (mostly complaining about) why and trying to induce caring. This is rarely effective with poor students but always starves good students.
One strategy is Tit for Tat: focus on students who demonstrate interest and reward them with attention, guidance, and feedback.
An example is providing feedback on written work. Spending a lot of time to provide quality feedback which is not even read is a waste of time and worse deprives an eager student.
This system could provide a history as a solid indicator of how much a student cares. How long did the student spend reviewing previous feedback? Did they rework? What was the evaluation change?