Mo. Rev. Stat. § 171.151
Each public school of the state shall keep a daily register in which shall be entered the name, age, date of entrance and record of attendance of each pupil and the studies pursued by the pupil.
(L. 1963 p. 200 § 11-15, A.L. 1977 H.B. 130)
(Source: RSMo 1959 § 163.140)