Summary:
Chsd 99 has two high schools serving grades 9–12: North High, with 2,082 students, and South High, with 2,591. Together, the schools perform well above statewide results on the nine comparable 2025–2026 test measures: their equal-weighted average is 69%, compared with 47% statewide, a 21-point advantage. The most important takeaway is that both schools beat the state in every measure, while North leads South in all nine.
North High stands out for the stronger results and SchoolDigger ranking; South High is lower of the two, but still above the state on every reported test. North’s lead ranges from 1 point in grade 11 ACT science to 18 points in grade 10 PreACT Secure math; the grade 10 ELA gap is also substantial at 17 points. SchoolDigger ranks North 24th of 620 schools (96th percentile, five stars) and South 70th of 620 (89th percentile, four stars). North’s margins over the state range from 23 to 31 points, while South’s range from 10 to 22 points.
Scores changed unevenly between 2024–2025 and 2025–2026, and the schools’ average lead over the state narrowed by 3 points. Both schools improved in grade 10 PreACT Secure math—by 10 points at North and 3 at South—but fell in grade 11 ACT math, by 7 and 5 points, respectively. Other differences may matter to families: South’s 2025–2026 chronic absenteeism rate was 23%, below the state’s 24%, while North’s was 25%; North had the higher graduation rate, 95% versus 90%, with both near or above the state’s 90%. North also had a lower student–teacher ratio (13.7 versus 14.6). In 2021–2022, free/reduced lunch eligible shares were 9% at North and 17% at South. These figures describe differences between the schools, but do not explain what caused them.
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