Conn. Gen. Stat. § 10-250: Report showing number of children.

Annually, not later than June fifteenth, the superintendent of schools for each local or regional school district shall file with the Commissioner of Education a report, on a form prescribed by said commissioner, showing the number of children of compulsory school age residing within the jurisdiction of such school district determined in accordance with the provisions of section 10-249 and such other information as said commissioner requires.