Remedial students, already checked out,barely used it.
How about a more assertive and active AI tutor and some consequences for not doing work? That is one thing about a human tutor. They are physically right there versus an AI that is waiting for the student to do something.
So for remedial students try a system that has timers for inactivity and real life consequences for ignoring the system.
Need to do a study with students that are average or above average.