Original Research by School Decision on John Muir Charter
John Muir Charter serves grades six through twelve as a charter school within the John Muir Charter District. The school's enrollment tilts heavily toward high school, with the vast majority of students in tenth, eleventh, and twelfth grades. Just a handful of middle-grade students are enrolled. A very substantial share of the student body qualifies for free or reduced-price lunch, and the enrollment is majority Hispanic, with smaller shares of white and Black students and very small numbers of other racial and ethnic groups.
State testing data for sixth and seventh grades is suppressed, likely due to small enrollment in those grades. Eighth-grade results for English language arts and mathematics are missing, suggesting the school does not test an eighth-grade cohort. Statewide assessment results reported for this school overall show proficiency rates well below what is typical. Across all tested grades and subjects, proficiency in English language arts sits at a modest level, mathematics proficiency is notably low, and science proficiency is in the low range. The school has only one year of reported data, so no trend is available.
No graduation rate, chronic absenteeism data, or information on students with individualized education programs or English learners appears in the available records. The school's small middle-grade presence and alternative-pathway design shape which metrics apply.
The district launched the John Muir Virtual Career Academy in 2026 as a statewide online program serving grades six through twelve and students up to age 26 across multiple counties, initially Nevada County and surrounding areas. This expansion was designed to remove geographic barriers for rural students balancing work, family, or caregiving responsibilities. The program includes career-focused coursework, career technical education aligned with in-demand industries, and paid job training alongside standard academic pathways. The school underwent charter renewal before the Nevada County Superintendent of Schools in spring 2026, a process that determines whether it may continue operating.
Beginning in the 2025-26 school year, the district added neurodiversity resources for families and students, drawing on tools from the UC and CSU Collaborative for Neurodiversity and Learning to support understanding of learning differences such as dyslexia. This reflects an intentional step to serve students with learning differences.
The school sits on McCourtney Road in Grass Valley, a small Sierra foothills city that blends a compact historic downtown on Mill Street, where the old Carnegie library and Center for the Arts sit, with surrounding residential neighborhoods. Grass Valley's economy leans on healthcare anchored by a major nonprofit hospital, technology and medical-device manufacturing, education, retail, and tourism tied to its preserved Gold Rush-era architecture. Housing values in the area are below the state median. The largest development under way is Loma Rica Ranch, a mixed-use project that will bring hundreds of new homes and associated retail and office space to the area over the coming years.
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