Iowa Code § 294.4: Daily register.

Each teacher shall keep a daily register which shall correctly exhibit the name or number of the school, the district and county in which it is located, the day of the week, month, year, and the name, age, and attendance of each scholar, and the branches taught; and when scholars reside in different districts separate registers shall be kept for each district, and a certified copy of the register shall, immediately at the close of the school, be filed by the teacher in the office of the secretary of the board.