The achievement gap between students at Ankeny Centennial High School who tend to lag behind their peers academically and the rest of the student body widened by 0.1 percentage points over the past three years, according to a Des Moines Guide analysis of the latest Iowa schools report card.
The achievement gap charts the performance of students who either receive free or reduced-price lunches (FRL), have an individualized education program (IEP) or are considered English language learners (ELL) compared to the other students at their schools.
Each year, Iowa public schools are evaluated based on several metrics, including proficiency, graduation rate, annual growth, college readiness, attendance and staff retention, among others. The combined scores of each metric yield an overall ranking: exceptional, high-performing, commendable, acceptable, needs improvement and priority.
Ankeny Centennial High School was ranked 'high-performing' in 2017.
To determine the achievement gap, proficiency in both math and reading among students is assessed for the three latest years.
In 2017, the three groups had a proficiency rating of 73.7 percent, while the rest of the student body had a proficiency rating of 97.7 percent. The resulting achievement gap of 24 percent compares to 25.4 percent in 2016 and 23.9 percent in 2015.
Ankeny Centennial High School's closing gap score was 51.6, which was greater than the state average of 50 percent.
Achievement gap at Ankeny Centennial High School