Summary:
ZIP code 92021 has two middle schools serving grades 6–8: Greenfield Middle and Los Coches Creek Middle. In 2025–2026, their unweighted average proficiency was 32% in English language arts, 18% in math, and 27% in science, compared with statewide rates of 49%, 38%, and 36%. The area’s largest shared gap from the state is in math, where both schools fall short.
Los Coches Creek Middle is the stronger performer in the latest results, leading Greenfield Middle in all three subjects: 44% versus 21% in ELA, 24% versus 11% in math, and 36% versus 17% in science. Those differences are 23, 13, and 19 percentage points, respectively. Los Coches is slightly above the state in grade 8 science (36% versus 35%); Greenfield is below the state in all three subjects. SchoolDigger ranks Los Coches at the 46th percentile statewide with 2 stars, while Greenfield is at the 8th percentile with 0 stars.
Recent results moved in different directions by subject: from 2024–2025 to 2025–2026, the two-school unweighted average fell 2 percentage points in ELA and 6 in math, but rose 11 in science. The average gap from the state widened in ELA and math, while narrowing in science. Los Coches’ science proficiency rose 20 points, while Greenfield’s ELA and math results fell 5 and 2 points. Context also differs: in 2024–2025, free/reduced lunch eligible students were 72% at Los Coches and 94% at Greenfield; student-teacher ratios were 19.5 and 22.6. These measures describe school circumstances, not why results differ; the two-year test trend is limited to one year-to-year comparison.
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