Summary:
ZIP code 92078 has four elementary schools in San Marcos Unified: Double Peak and La Mirada Academy serve grades K–8, while San Elijo Elementary and Discovery Elementary serve K–5. Three schools are above state proficiency figures in ELA, math and science; the fourth is below in all three. The most important takeaway is the sharp divide between those three schools and La Mirada.
Discovery leads all-grades math and science, with 76% and 69% proficiency; San Elijo leads ELA at 77.5%, just 0.3 points ahead of Discovery’s 77.1%. Double Peak is also strong, at 75% in ELA, 71% in math and 55% in science. By contrast, La Mirada posts 30% in ELA, 18% in math and 19% in science; the other three schools average 76%, 72% and 61%, respectively. La Mirada’s grade 5 results are a bright spot: its ELA and math scores are slightly above the state figures for that grade.
Recent changes are mixed: the four-school average rose by 1 point in ELA, was nearly unchanged in math, and increased by 2 points in science from 2024–2025 to 2025–2026. San Elijo gained 4 points in ELA and 3 in science, while Discovery fell by 3, 2 and 1 points in ELA, math and science. SchoolDigger ranks Double Peak, San Elijo and Discovery in the 93rd, 91st and 94th percentiles statewide; La Mirada ranks in the 32nd. As context, free/reduced lunch eligible figures for 2024–2025 were 21% at Double Peak, 77% at La Mirada, 16% at San Elijo and 17% at Discovery. Discovery also had the lowest absenteeism, 4%, and a 26.0 student-teacher ratio; these are observations, not explanations for test results.
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