Jcs - Mountain Oaks, Encinitas CA

Original Research by School Decision on Jcs - Mountain Oaks

JCS Mountain Oaks is a charter school serving kindergarten through eighth grade in Encinitas, with a small enrollment of about two hundred fifty students. The school draws a student body that is predominantly white, with smaller shares of students from Asian, multiracial, Hispanic, and Black backgrounds. About a quarter of students qualify for free or reduced-price lunch.

The most recent state assessment data shows mixed performance across grade levels and subjects. In math, proficiency rises through the middle grades, peaking at seventh grade where students perform well, then dips in eighth. In English language arts, the trajectory is steadier and generally stronger. Third grade struggles more noticeably in both subjects, particularly in reading, while grades four through seven perform at solid levels. Science proficiency, measured in grades five and eight, sits at moderate levels in both. Overall across all tested grades and subjects, the school's mean proficiency sits in the top quartile among the districts in San Diego County, a meaningful strength in a competitive regional context.

The school's character as a charter operation means it operates under a separate governance structure from traditional district schools. Details about staffing, discipline practices, or specific program offerings beyond the core curriculum were not available from the data provided.

The community context matters here. Encinitas is in a high-cost housing market, with home values and rental rates both well above state and national benchmarks. This shapes the likely demographic profile of families who can access the school, though the diversity of the current enrollment suggests the charter draws from a broader geographic or socioeconomic base than the neighborhood alone might predict.

Data on special education identification, English learner enrollment, chronic absenteeism, and attendance were not reported, so a parent may want to look into those areas directly with the school. A parent considering Mountain Oaks should ask about curriculum emphasis in the lower grades, where math and reading performance dip, and about the transition to eighth grade, where math proficiency notably drops.

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Academic performance

How students perform on state tests, by grade, set against the district.

Math

Grade 354%

School 54% · district not reported

▲ 11 pts above state median · ▲ 6 pts above county median

Grade 459%

School 59% · district not reported

▲ 22 pts above state median · ▲ 17 pts above county median

Grade 566%

School 66% · district not reported

▲ 35 pts above state median · ▲ 31 pts above county median

Grade 679%

School 79% · district not reported

▲ 49 pts above state median · ▲ 44 pts above county median

Grade 788%

School 88% · district not reported

▲ 57 pts above state median · ▲ 53 pts above county median

Grade 864%

School 64% · district not reported

▲ 36 pts above state median · ▲ 33 pts above county median

English language arts

Grade 346%

School 46% · district not reported

▲ 5 pts above state median · ▼ 1 pts below county median

Grade 470%

School 70% · district not reported

▲ 28 pts above state median · ▲ 22 pts above county median

Grade 579%

School 79% · district not reported

▲ 34 pts above state median · ▲ 27 pts above county median

Grade 674%

School 74% · district not reported

▲ 31 pts above state median · ▲ 23 pts above county median

Grade 785%

School 85% · district not reported

▲ 39 pts above state median · ▲ 33 pts above county median

Grade 877%

School 77% · district not reported

▲ 33 pts above state median · ▲ 30 pts above county median

Science

Grade 559%

School 59% · district not reported

▲ 31 pts above state median · ▲ 24 pts above county median

Grade 855%

School 55% · district not reported

▲ 29 pts above state median · ▲ 24 pts above county median

This schoolDistrict average, same grade

Graduation rate (ACGR) reflects the federally published Adjusted Cohort Graduation Rate for the most recent year available. We refresh this data annually at the close of each academic year in June. The federal source publishes a banded rate (for example, "90-94%") instead of an exact number for cohorts small enough to risk identifying individual students. The state distribution chart, where shown, plots every school in the state with a published rate or band; schools whose rate is federally suppressed are excluded. Where the federal source publishes a band rather than an exact rate, the school is placed within its band using a stable, ID-derived offset, so its position is consistent across visits.

Proficiency by household income

English language arts

Grade 6Lower-income87%Higher-income68%19 pp gap

Mathematics

Grade 6Lower-income80%Higher-income79%1 pp gap