Summary:
Lammersville Joint Unified includes nine schools: eight serving kindergarten through eighth grade and one high school. The K–8 schools average 74% proficiency in ELA, 69% in math, and 67% in science, compared with state figures of 49%, 38%, and 36%. The high school serves different grades, so its scores are discussed separately. Most importantly, all eight K–8 schools exceed the supplied state figures in all three subjects.
Julius Cordes Elementary leads the K–8 schools in ELA (88%) and math (89%); its ELA result is 4 points above the next-highest, Evelyn Costa Elementary, and its math result is 5 points higher. In science, Hansen Elementary and Costa are nearly tied at 82%. At the other end, Lammersville Elementary is lowest in all three subjects: 57% in ELA, 47% in math, and 42% in science. Mountain House High also stands out against state 11th-grade results: its ELA, math, and science scores are 80%, 64%, and 66%, versus 57%, 32%, and 38% statewide. Its graduation rate is 99% versus 88% statewide.
Recent changes are mixed: the K–8 average rose 2 points in ELA and science from 2024–25 to 2025–26, while math was essentially flat. Costa improved in all three subjects; Lammersville gained 8 points in ELA and 5 in math but remains lowest overall. SchoolDigger ranks Cordes #51 of 5,804 elementary schools statewide, in the 99th percentile. As context, schools report free/reduced lunch eligible figures for 2024–25: among K–8 schools, these range from 3% at Cordes to 37% at Lammersville. Lammersville also has the lowest reported K–8 student–teacher ratio, 16.8, but that does not correspond to higher scores; these measures are observations, not explanations of results.
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