N.C. Gen. Stat. § 115C-97

The State Board of Education may discontinue the adoption of supplementary textbooks and, at the expiration of existing contracts, may discontinue the purchase, warehousing, and distribution of supplementary textbooks. The Board may also discontinue the purchase and resale of library books. Funds appropriated to the State Board of Education for supplementary textbooks shall be transferred to the State Public School Fund for allotment to each local school administrative unit, based on its average daily membership, for the purchase of supplementary textbooks, library books, periodicals, and other instructional materials.