Ask a student what they revised last night and you will usually hear the topic they already like. Rereading a comfortable chapter feels like work, and the feeling is the problem: comfort and coverage are different things.
Exam boards publish exactly what an exam can ask. That specification is the single most underused document in a school. When a revision plan is built from the spec backwards, starting at the exam date and working through every topic with the weakest first, "I revised" starts to mean something measurable.
Lock In ships with exam specifications built in, so a student's revision plan is a walk through the actual syllabus, and a teacher can see topic coverage rather than guess at it. The night-before cram does not disappear because students become disciplined. It disappears because the plan started three weeks earlier without anyone having to remember to start it.