The achievement gap between students at Horizon Elementary who tend to lag behind their peers academically and the rest of the student body widened by 0.9 percentage points over the past three years, according to a Johnston Times 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.
Horizon Elementary was ranked 'commendable' 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 69.5 percent, while the rest of the student body had a proficiency rating of 97.1 percent. The resulting achievement gap of 27.5 percent compares to 17.4 percent in 2016 and 26.6 percent in 2015.
Horizon Elementary's closing gap score was 50.5, which was greater than the state average of 50 percent.
Achievement gap at Horizon Elementary