Depends on what student /class list you use. There are those that ask you a question if you want only current students. Obviously yours doesn't. So most likely you can choose the date on top by the from and to and it will only show students that are attending between those days. Than there are certain reports that you would need to query for only current students to display only current students. (Please note, we usually cant answer on specific reports here, as each school/org have their own reports.)