Summary:
Zip code 37073 in Greenbrier, Tennessee, is served by a single high school: Greenbrier High School, which enrolls 769 students in grades 9–12 as part of Robertson County Schools. This makes the analysis straightforward—Greenbrier High School is the sole high school option in the area, and it stands out as a rising school within a district that overall ranks in the bottom third of Tennessee districts.
Greenbrier High School has improved its state ranking dramatically, moving from the 37th percentile (2 stars) in 2023–2024 to the 56th percentile (3 stars) in 2025–2026, a jump of 73 positions. The school boasts a graduation rate of 92.4%, well above the district's 85.9% and the state's 90.5%, and a dropout rate of just 4.7%—less than half the district rate of 11.0%. Academically, the school's strongest subject is Biology I, with 52.4% proficiency, surpassing both the district and state. However, math proficiency lags: Algebra I (21.3%), Algebra II (26.4%), and Geometry (34.7%) all trail state averages by significant margins, and US History (34.4%) sits 11.6 points below the district average.
Encouragingly, Greenbrier High School showed improvement in every tested subject from 2024–2025 to 2025–2026, with the largest gains in Biology I (+16.6 points) and Algebra I (+11.1 points). Grade-level data suggests that accelerated students take Algebra II and Geometry earlier, leading to very high proficiency in 9th and 10th grade while upper-grade scores lag. While data on free/reduced lunch and student-to-teacher ratio was unavailable, the school's strong persistence metrics and upward academic trajectory make it a solid educational choice in the Greenbrier area.
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