Select All when capturing absent learners - end of Term

Select All when capturing absent learners - end of Term

Good Day 

End of term is a hectic time for all schools. End of term means majority of learners absent with NO VALID REASON.
NO VALID REASON is a legitimate absent reason on SASAMS.
Please consider a SELECT ALL option so that we can select all learners when capturing learner absenteeism.
Our school has 1171 learners, I do not have time to select each and every individual learner  that is absent.
If we can select all then unselect the few that are at school things will be much less hectic and stressful. 
Please consider this option.
Thank you and kind regards 
Linda