Summary:
Zip code 93063 includes 10 Simi Valley Unified schools: seven elementary schools, one middle school and two high schools. Results vary across the area, with some schools well above state proficiency levels and others well below. The most important finding for families is how wide those differences are, especially among elementary schools: their results span 41 percentage points in ELA, 37 in math and 57 in science.
Santa Susana High stands out among high schools, with 82% proficient in ELA, 51% in math and 68% in science—about 33, 13 and 32 points above state results. It also led Simi Valley High by 24 points in ELA, 17 in math and 30 in science. Among elementary schools, Big Springs Elementary led in all three subjects, at 66% in ELA, 59% in math and 62% in science. At the lower end, Santa Susana Elementary had 28% in ELA and 22% in math, while Knolls Elementary had the lowest science result in the area, at 5%.
Recent changes are mixed: across the 10 schools, average results fell 1 point in ELA from 2024–2025 to 2025–2026, rose 2 points in math and rose 1 point in science. Individual patterns differ: Knolls’ math increased 18 points while its ELA fell 11 and science fell 15; White Oak Elementary’s math rose 4 points while its science fell 13. SchoolDigger’s 2025–2026 rankings place Santa Susana High at the 93rd percentile with five stars, compared with the 19th percentile and one star for Santa Susana Elementary and the 26th percentile and one star for Knolls. All schools report free/reduced lunch eligible for school year 2024–2025; shares range from 35% at Big Springs to 68% at Santa Susana Elementary, while Knolls is at 56%. These figures offer context, not an explanation of test results; elementary student-teacher ratios also vary, from 17.6 at Knolls to 23.2 at Big Springs.
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