Summary:
ZIP code 91739 has one listed high school, Etiwanda High, serving grades 9–12 with 3,446 students. Its latest results show strong graduation and test outcomes, though attendance is closer to the state norm; most notably, proficiency was above California’s in all three tested subjects in 2025–2026.
Because Etiwanda High is the only school listed, it is technically both the area’s top and bottom school, but there is no meaningful local comparison. It stood out against the state in ELA, where 76% of students were proficient versus 49% statewide—a 27-point advantage. The school was also 8 points ahead in math (47% versus 38%) and 17 points ahead in science (53% versus 36%). It exceeded Chaffey Joint Union High by 12 points in ELA, 10 in math, and 14 in science. Graduation was 95%, compared with 88% statewide, while the 4% dropout rate was below the state’s 8%. Chronic absenteeism was nearly the same as the state rate: 18% versus 18%.
Results changed in different directions by subject between 2024–2025 and 2025–2026: ELA proficiency fell by 5 points, from 81% to 76%, while science rose by 12 points, from 42% to 53%; math edged up by 1 point, to 47%. SchoolDigger ranked the school 230th of 2,137 California schools in 2025–2026, at the 89th percentile, down from the 91st percentile the year before but still a high statewide position. In 2024–2025, the student–teacher ratio was 25.3, and 55% of students were reported as free/reduced lunch eligible. These figures provide context, not an explanation for the school’s results. With only one school listed, the data cannot show how performance varies among high schools in the ZIP code.
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