HERE’S a math problem only truant officers will get right: How is it possible for many school districts in America to report both that average daily attendance is better than 90 percent and that almost 30 percent of students miss a month of school annually?
(a) Averages hide underlying data. While a few schools have nearly perfect attendance, most have a serious truancy problem.
(b) Elementary schools are large and have high attendance, while middle and high schools have smaller enrollments and miserable attendance. Large numbers of dropouts in the upper grades hide mass absences because enrollments there are lower.
(c) That 90 percent average daily attendance doesn’t mean the same 10 percent of children are out all the time; it could mean 30 percent are chronically absent, only on different days.
Sadly, the answer is: