What our primary schools do if they complete electronic attendance is to have a laminated class list next to their laptop / desktop and when they are aware of a student being absent they mark them off on the laminted list. Then the list is placed on the board or near the fire exit in the same location so everyone is aware where it is.
In the afternoon / nextday the laminated list is wiped and starts again, this also saves printing costs as do not have to reprint a list every am and pm. (One school in the inital stages printed lists every am and pm this cost way too much in ink and paper) Hope that this helps :-)
