Summary:
ZIP code 86403 has three high schools: Lake Havasu High School and Telesis Preparatory Academy serve grades 9–12, while Havasuonline serves grades 6–12. Published test results show a wide spread: the two schools with scores are 32 points apart in all-grades ELA and 25 points apart in math. The clearest overall finding is that Lake Havasu leads the published results, while Havasuonline is below the state in every reported subject comparison.
Lake Havasu stands out most clearly: its 2025–26 ELA proficiency is 5 points above the state for all grades and 8 points above for 11th grade; its 2024–25 11th-grade science result is 14 points above the state. Math is closer to the state, at 1 point below in all grades and 1 point above in 11th grade. At the other end, Havasuonline is 23–27 points below the state in its reported ELA and math comparisons and 5 points below in science. Telesis has no published proficiency scores for comparison. Lake Havasu also reports a 92% graduation rate, compared with 80% statewide; Havasuonline’s dropout rate is 9%, versus 5% statewide.
Recent SchoolDigger standings declined for both schools with rankings in the latest two years: Lake Havasu went from the 64th percentile in 2024–25 to the 57th in 2025–26, while Havasuonline fell from the 13th to the 7th percentile. Telesis has no ranking listed for 2025–26; its latest listed percentile was 54 in 2022–23, down from 75 in 2020–21. Enrollment and student–teacher ratios also differ: Lake Havasu has 1,523 students and a 21.5 ratio, Havasuonline has 339 and a 31.3 ratio, and Telesis has 63 and a 14.5 ratio. Telesis’s suppressed scores mean its academic results cannot be compared with the other schools.
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