Children in specific classes in national school, usually second, fourth and sixth class, are targeted for preventive measures under the school dental programme. The children in these classes are screened and referred for treatment as necessary; the programme has been specifically designed to ensure that children are dentally fit before they leave national school. The screening provided in second, fourth and sixth classes ensures that follow up appointments for examination, treatment or orthodontic review are made, as necessary, with the Dental Surgeon in the clinic designated for the particular school(s). Children who have attended national school retain eligibility to dental treatment up to their 16th birthday.