ADA stands for “Average Daily Attendance.” The state of California funds school districts based on each student’s daily-recorded attendance. ADA is calculated by dividing the total number of days of student attendance by the number of days of school taught during the same period. Larchmont Charter School budgets for program and curriculum based upon projected enrollment and ADA. Additionally, LCS only receives money for the days when a student is actually in school. If your child has an unexcused absence, the school loses money - about $45 per student per day. That can really add up!