Average daily attendance (ADA) - American Education

A statistic used by schools and school districts for determining the amount of funding due from the state each year. Computed from data recorded in school attendance registers, the ADA is calculated by dividing the total number of student attendance days during the entire school year by the number of days the school was open. The average daily absence is calculated by dividing the total number of student days of absence during the school year by the number of days the school was open and functioning.