Summary:
ZIP code 83706 contains just one high school: Timberline High School in Boise, Idaho, which serves 1,307 students in grades 10–12 within the Boise Independent District. As the only high school in this area, Timberline is the primary secondary option for local families, and it stands out as a solid, above-average Idaho school. The school holds a 3-star rating and ranked #40 out of 122 Idaho high schools in the 2025–2026 school year, placing it in the 67th percentile.
Academically, Timberline consistently outperforms its district in core subjects. On the 2025–2026 ISAT End of Course assessments, 45.0% of students were proficient in math, compared to 32.4% for the district and 33.1% for the state. Science proficiency was 50.1%, well above the district's 38.8% and the state's 41.2%. English language arts proficiency was 60.1%, above the district's 48.8% but slightly below the state's 61.3%. The school also maintains a 17.6:1 student–teacher ratio, and only 16.68% of students qualified for free/reduced-price lunch in 2024–2025, indicating a relatively advantaged student population.
There are a few areas to note. Timberline's graduation rate of 82.5% matches both the district and state averages exactly. Chronic absenteeism affects 17.3% of students — better than the district's 22.5% but worse than the state's 13.8%. Additionally, the school's statewide percentile rank has declined from the 84th percentile in 2023–2024 to the 67th percentile in 2025–2026, even though its absolute rank improved from #25 to #40. With strong math and science results, low poverty rates, and large grade-level cohorts averaging roughly 436 students, Timberline High School remains a strong option in the Boise area, but families may want to watch attendance trends and statewide standing.
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