Mo. Rev. Stat. § 160.516: Curriculum, textbooks, and other instructional materials not to be mandated by state board or department — exceptions — appendix to common core standards not to be required.

1. Notwithstanding the provisions of section 160.514, the state board of education and the department of elementary and secondary education shall not be authorized to mandate and are expressly prohibited from mandating the curriculum, textbooks, or other instructional materials to be used in public schools. Each local school board shall be responsible for the approval and adoption of curriculum used by the school district. The provisions of this subsection shall not apply to schools and instructional programs administered by the state board of education and the department of elementary and secondary education or to school districts that are classified as unaccredited.

2. The state board of education and the department of elementary and secondary education shall not require districts to use any appendix to the common core state standards.