Best Public Schools in Zip Code 37721

Located in Corryton, Tennessee, ZIP code 37721 is home to 3 schools in the Knox County Schools district, serving approximately 2,190 students across Gibbs High School (grades 9–12), Gibbs Elementary School (grades PK–5), and Corryton Elementary School (grades K–5). There is no middle school in the ZIP code, so students in grades 6–8 attend school outside the area. While the district ranks in the 45th percentile statewide with a 2-star rating, every school in 37721 ranks well above that district-wide level.

Corryton Elementary School is the clear academic leader, ranking in the 78th percentile statewide with a 4-star rating. Its math proficiency (60.2%) and ELA proficiency (65.0%) far exceed district and state averages, and it has the lowest chronic absenteeism (11.3%) in the group. This small school of 195 students also spends the most per pupil at $15,264. Gibbs Elementary School remains above district and state averages in most subjects, but its ranking has slipped from the 77th to the 67th percentile over three years; its 5th-grade science (61.4%) and math (64.1%) are standout subjects. Gibbs High School is the most improved, rising from the 40th to the 60th percentile, with average proficiency across seven TNReady subjects jumping from 32.7% to 40.6%, led by a +16.2 point gain in Geometry.

However, Gibbs High School still faces challenges. Its chronic absenteeism rate of 24.8% is well above the state average of 18.3%, and its graduation rate (88.9%) and dropout rate (7.9%) both trail state benchmarks (90.5% and 6.7%, respectively). Advanced course-taking at the high school also means aggregate scores can be misleading — 10th graders taking Algebra II or Biology I score far above state averages, while 12th graders in the same subjects score below them. Families should note that per-student spending varies significantly, with Corryton Elementary spending about 17% more per student than Gibbs Elementary, and that the lack of a middle school creates a structural gap in the local K–12 pathway.