While this is not our school policy, I know of schools with the long-standing policy of not allowing students to study for tests (at school) the day of, or the period of the test. For myself, as a student, I liked the reassurance of going over my notes one last time-even though I’d spent plenty of time on them the day before.
At the first grade level that I teach, I don’t have students study for tests (unless it is a spelling test towards the end of the year.) I try to keep tabs on the weak areas of the students and reinforce them as we go along. Having a good system of review can help eliminate the need for student cram-studying.