Mountain School, Flagstaff AZ - Test Scores & Data

Original Research by School Decision on Mountain School

Mountain School is a charter elementary school in Flagstaff, serving kindergarten through sixth grade. It operates as a single-school district under the name Mountain School Inc., meaning it is a standalone charter not part of a larger local district. The school is small, and its enrollment for the reported year included students in kindergarten through fifth grade, with no sixth graders enrolled at that time. Families considering this school should confirm the current grade configuration directly with the school.

Flagstaff sits at high elevation on the Colorado Plateau, surrounded by ponderosa pine forest. It is a city where a major university, federal science installations, and tourism are economic pillars. Downtown Flagstaff has a historic core of restored sandstone buildings, and the city’s character is shaped by its railroad past, Route 66 legacy, and proximity to the Grand Canyon and other natural attractions. The housing market in the area is expensive relative to the rest of Arizona and the nation, a factor families weighing a move into the school’s attendance area should factor into their budget.

Academically, Mountain School performs well relative to other districts in Coconino County. Its overall proficiency across tested subjects and grades places it in the top quarter of the county’s districts. In English language arts, proficiency rates from third through fifth grade are generally strong, with fifth grade showing particularly high achievement. Math proficiency is solid across those grades, with fifth grade again the strongest. Science proficiency at fifth grade is also above the county median. Only a single year of state assessment data was available, so no trend information is present to indicate whether performance is improving or declining.

The student body is predominantly white, with a notable Hispanic segment and smaller shares of American Indian, Asian, and multiracial students. Data on students qualifying for free or reduced-price meals, as well as students with disabilities and English learners, was missing from the available records. A parent may want to ask the school directly about the availability of support services and the socioeconomic composition of the student community, as those factors matter for understanding the peer environment and resource allocation.

As a charter school, Mountain School offers an alternative to the traditional Flagstaff public schools. The school’s website and mission are not detailed in the provided data, so families interested in specific instructional approaches, enrichment offerings, or after-school programs should research those directly. The district brief found little in the way of recent curriculum changes, referenda, or administrative shifts, suggesting a stable operating context.

For a family seeking a small, academically strong elementary charter in a vibrant college town with a high cost of housing, Mountain School warrants a close look. The school’s academic record in the county is a clear point of confidence, but the missing data on student support programs and demographics means a follow-up conversation with the school is essential to round out the picture.

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Academic performance

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

Math

Grade 350%

School 50% · District 51% · ▼ 1 pts below district

▲ 6 pts above state median · ▲ 7 pts above county median

Grade 452%

School 52% · District 52%

▲ 8 pts above state median · ▲ 16 pts above county median

Grade 563%

School 63% · District 61% · ▲ 2 pts above district

▲ 21 pts above state median · ▲ 15 pts above county median

English language arts

Grade 362%

School 62% · District 64% · ▼ 2 pts below district

▲ 22 pts above state median · ▲ 19 pts above county median

Grade 458%

School 58% · District 58%

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

Grade 581%

School 81% · District 82% · ▼ 1 pts below district

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

Science

Grade 561%

School 61% · District 61%

▲ 24 pts above state median · ▲ 15 pts above county median

This schoolMountain School Inc. (4203), 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.