Summary:
ZIP code 92313 has one high school, Grand Terrace High School at the Ray Abril Junior Edal Complex, serving grades 9–12 and enrolling 1,647 students. With no other high school in this local group, it is the only option represented here. Its most important academic takeaway is a sharply mixed profile: its English results are well above the state, while math results are notably below it.
Grand Terrace is formally both the highest- and lowest-ranked school in this ZIP-code group, but there is no meaningful school-to-school comparison. Against California, its all-grades English language arts proficiency was 65%, 16 percentage points higher; math was 21%, 17 points lower; and science was 29%, 7 points lower. It exceeded Colton Joint Unified in all three subjects, by 32 points in English, 1 point in math, and 9 points in science. Graduation and dropout results also compare favorably with the state: 97% graduated, versus 88% statewide, while the dropout rate was 2%, versus 8%. Chronic absenteeism, however, was 20%, 2 points above the state.
Test results improved in all three core subjects from 2024–2025 to 2025–2026: English rose 6 percentage points, math 4, and science 4. The school’s simple average across those subjects increased from 34% to 39%, while the state’s rose from 40% to 41%, narrowing the school’s average shortfall from 6 points to 3. SchoolDigger ranked Grand Terrace 937th of 2,137 schools, at the 56th percentile with 3 stars in 2025–2026; its percentile was 57th in 2023–2024 and 52nd in 2024–2025. The school’s student-teacher ratio was 20:1, and 74% of students were free/reduced lunch eligible in 2024–2025. These are context measures, not explanations for results.
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