date for moving a child up

It would be nice to have a date to move a child up to another class. then have the reports match that. right now if i pull a meal count report from 3 months ago its going to show a child who has moved in the wrong class, same goes for when we change a child in the mdl of a month they will only show up in the new class. it would be nice if they would show up from specific date for one class then the dates again would show for the new class. it makes for a lot of switching back and forth to match roll call sheets.