Depends on the school I guess...
Some schools like mine try to arrange the academic calendar so the student will have time to review for Part I... Our sophomores end their summer session in the first week of June, which gives them 6 weeks to review for the Part I that is given mid-July. 6 weeks is plenty of time to review and get a 90+ methinks, as long as the student does not dilly-dally. 😀