Summary:
Alturas Preparatory Academy Inc is a single-school district in Idaho Falls, ID, containing one high school — Alturas Preparatory Academy — which serves grades 6 through 12 with 463 students and a student-teacher ratio of 16.6 to 1.
Alturas Preparatory Academy is a high-performing school that outperforms Idaho state averages in nearly every subject. In 2025–2026, all-grade proficiency rates exceeded state averages by 7.7 points in math (50.8% vs. 43.1%), 15.8 points in science (58.5% vs. 42.7%), and 8.4 points in English Language Arts (62.4% vs. 54.0%). The school's science program is especially strong, with End of Course science proficiency at 63.6% — 22.4 points above the state. Eighth grade ELA stands out at 73.8% proficiency, 19.3 points above the state average. Middle school math is also a notable strength, though proficiency drops from 56.3% in 6th grade to 41.2% at the End of Course level. The school has improved from a rank of 62nd out of 159 schools in 2023–2024 to 31st out of 122 in 2025–2026, earning a 4-star rating and a 75th percentile standing.
However, there are concerns. Chronic absenteeism is 25.8%, nearly double the state rate of 13.8%, which suggests that even though aggregate test scores are strong, many students are missing significant instructional time. The graduation rate sits at exactly the state average of 82.5%. Additionally, about 26.78% of students qualify for free or reduced-price lunch, a relatively low share that provides context for the school's above-average proficiency rates. Since Alturas Preparatory Academy is the only school in the district, all district-level metrics match the school's numbers, and the district ranks 14th out of 101 with an 86th percentile. For parents, this school offers strong academic performance and clear momentum, but absenteeism is the key area to watch.
Thank you for your feedback!