Summary:
ZIP code 99003 has five schools serving about 1,570 students from prekindergarten through grade 12, including elementary, middle, high school, and alternative K–12 options. All are part of the Riverside School District, which ranks in the 74th percentile statewide and serves an area with generally strong districtwide performance but noticeable differences by grade level and subject.
Chattaroy Elementary is the strongest current testing performer. Its 2025–2026 proficiency rates were 60.42% in English language arts and 67.71% in math, both well above district and state results, with especially strong fourth-grade outcomes. Riverside Elementary also performed above district and state benchmarks in math and science and has the lowest student-teacher ratio, at 14.3 to 1. Its ranking rose to the 77th percentile, although fifth-grade math was a relative weakness. Chattaroy’s ranking also improved substantially, while its current results were reported for a different period than its latest ranking.
Riverside High School is the strongest secondary option, with a 95.1% graduation rate, 67.39% ELA proficiency, and science results above district and state levels. Math is its main area for improvement, at 34.09%. Riverside Middle School shows greater concern: its ranking fell to the 51st percentile, while ELA and math declined notably, despite a large science improvement. Independent Scholar offers a smaller alternative K–12 setting, but its results should be compared cautiously because of its different mission, small enrollment, broader grade span, and some suppressed data. Overall, the main priorities are secondary math, middle-school ELA and math, and maintaining the elementary schools’ stronger performance.
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