of students missed 10% or more of the school year
Lower is better: fewer students missing large amounts of school.
The grey dashed "CPS District" line is the district-wide CPS average — every school across Chicago, all grade levels — not just schools serving the same grades as this one. It is CPS's own published district figure, shown exactly as reported.
A student is "chronically absent" when they miss 10% or more of school days in a year — about 18 days, or roughly two days every month. Excused and unexcused absences both count. Research links chronic absence to falling behind in reading and to dropping out, which is why schools watch this number closely.
This rate is the one CPS publishes on the school's own profile. Illinois's official Report Card lists a separate chronic-absenteeism number for this school — usually several points higher — because the state counts enrolled days and attendance a little differently. If you look this school up on the Illinois Report Card, expect that figure to run higher; both are correct, they just count slightly differently.