S.C. Code Ann. § 59-19-340: Child development programs for three and four-year-old children.

The board of trustees of each school district may establish and provide for the education of children who will attain the age of four on or before September first of the applicable school year in child development programs. The board of trustees of school districts having programs serving three and four-year-olds on the date of enactment of this section may continue to serve three-year-old children.