Nineteen parents and guardians have appeared before magistrates in Norfolk charged with the unauthorised absence of their child from school.
The prosecutions at Great Yarmouth Magistrates' Court on Friday concerned 11 children, aged between seven and 15, and all registered at schools in the local area.
Many of the parents were given six-month conditional discharges.
Two of the parents blamed their daughters' absences on school policies disallowing access to toilets during lessons, preventing them from changing sanitary products.