A recent report, “Absences Add Up,” also from Attendance Works, documents what many know from common sense: At every age, in every demographic, and in every state and city tested, students with poor attendance scored significantly lower on standardized tests. In our schools, this translates into weaker reading skills, failing grades, and higher dropout rates. Rather than looking at attendance as an administrative chore, schools can use the same data as a warning sign to change the trajectory.