Mo. Rev. Stat. § 178.300
178.300 Part-time schools established, when.
178.300. Part-time schools established, when. — Whenever in any school district in this state not less than twenty-five employment certificates for children under sixteen years of age have been issued and are in full force and effect, the school district shall establish and maintain part-time schools, departments or classes for the employed children for not less than four hours per week and for a term not less than that in which schools are regularly in session in the district.
(L. 1963 p. 200 § 13-30) (Source: RSMo 1959 § 162.200) CROSS REFERENCES: Child labor, 294.011 to 294.110 Compulsory attendance of part-time schools, 167.051