ACE Walk-In Schedule ACE is currently appointment-only for all courses Walk-in hours are currently cancelled due to low traffic. Please refer to the appointments page listed below or to the left. ACE provides daily walk-in hours specific to courses on a first-come, first-served basis. Tutoring may be one-on-one or in a group depending on student traffic. During walk-in hours, tutors are only available for the scheduled courses and times listed in the calendar below. If you would like schedule an appointment outside of the walk-in hours for your course, visit the appointments page.