It comes amid changing advice over the past week.
Advice for mask wearing in schools has been updated by the Department of Education.
It says children shouldn't be left out of class without principals trying to talk 'sensitively' to parents who object to their child wearing a mask.
Last week, it said children in third class and above should be sent home for not having a medical reason for not wearing a mask.
Longford/Westmeath Sinn Fein TD Sorca Clarke says schools and parents deserve clarity from the department:
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