S.C. Code Ann. § 59-21-10

For the purpose of this article, a "school" is defined as a division of the school system consisting of pupils composed of one or more grade groups, organized as one unit with one or more teachers to give instructions of a defined type, and housed in a school plant of one or more buildings. More than one school may be housed in one school plant, as in the case when elementary and secondary programs are housed in the same plant.