Summary:
Zip code 37721 (Corryton, TN) contains one public high school, Gibbs High School, serving grades 9–12 and part of Knox County Schools. Gibbs is the only high school in the area, so this summary focuses on how it performs relative to its district and state, as well as its own improvement over the past two years.
Gibbs High School is clearly on an upward trajectory. Its state rank jumped from the 40th percentile (237 out of 392) in 2023–2024 to the 60th percentile (159 out of 400) in 2025–2026, earning a 3-star rating. The school now outperforms its own district's overall statewide percentile. Test scores improved dramatically year-over-year in nearly every subject, with especially large gains in Geometry (+16.2 points), Algebra II (+14.6 points), and US History (+11.5 points). Gibbs now surpasses both the district and state in Geometry, and beats the state average in Biology. Standout grade-level results include 10th-grade Biology I (78.5% proficient vs. 41.3% statewide) and 10th-grade Algebra II (71.2% vs. 63.9% statewide), showing real strength in early high school science and math.
However, there are clear areas of concern. Gibbs trails both district and state averages in Algebra I, English I, and US History, and upper-grade proficiency is especially low, such as 12th-grade Algebra II at just 6.3% proficient. Chronic absenteeism is a red flag: 24.8% of students are chronically absent, well above the district (19.4%) and state (18.3%). The dropout rate (7.9%) is also higher than the state average (6.7%), while the graduation rate (88.9%) sits slightly below both district and state norms. The school spends $13,296 per student, but data on free/reduced-price lunch and student-teacher ratio are unavailable. Overall, Gibbs is improving meaningfully; if it can tackle attendance and support students in Algebra and English, it is well-positioned to sustain its upward trend.
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