San Tan Charter School, Gilbert AZ

Original Research by School Decision on San Tan Charter School

San Tan Charter School is a K-12 charter school in Gilbert, Arizona, serving kindergarten through twelfth grade as a single-campus regular public charter. It is part of the San Tan Montessori School Inc. charter district. The school enrolls a sizable student body spanning all elementary, middle, and high school grades. Among the student population, White students make up the majority, with a notable Hispanic presence and smaller shares of Black, Asian, and multiracial students. Data on economic disadvantage, special education services, and English learner status were not available in this profile.

On state assessments for the most recent school year, math proficiency across grades three through eight ranged from around a third to just over two-fifths of students meeting the bar. In English language arts, proficiency rates were slightly higher, spanning from about two-fifths to three-fifths, with seventh grade showing the strongest result. In science, roughly two-fifths of fifth graders and a third of eighth graders scored proficient. Taken together, the school’s overall proficiency index sits just above the midpoint among the many districts in Maricopa County, placing it in the broad middle range locally. Multi-year trends were limited by available data, making year-over-year comparisons unreliable. A graduation rate was not provided, so families seeking a complete picture for the high school years may want to ask the school directly about this metric.

Several typical data points are absent from this profile. Beyond economic and special population data, we looked for disciplinary records, staffing ratios, and attendance patterns but found none in the available data. For a charter school that operates independently, these factors can vary widely, and a parent may wish to follow up with the school office for specifics.

The community context matters here. Gilbert is a large residential suburb southeast of Phoenix that has transformed rapidly from a farming town into a master-planned suburban city. Its growth has been explosive over recent decades, though the pace has moderated. The built environment is largely car-dependent, with wide arterial roads and residential subdivisions. A small historic downtown called the Heritage District offers some pedestrian-oriented amenities, including restaurants and civic buildings. Major employers include school districts, healthcare systems, and a defense contractor. Housing values are higher than the national median, reflecting the area's desirability. For a charter school drawing from a broad attendance area, this means families are likely commuting from various neighborhoods across Gilbert.

The district itself, San Tan Montessori School Inc., is a single-school charter authority. We searched for recent changes or initiatives that would affect a parent's decision and found nothing meeting the threshold of lasting impact. The school appears to operate without major publicized shifts in recent years.

For a family considering this school, the profile suggests a mid-sized K-12 charter in a fast-growing suburb with academic results near the county average. The school's Montessori affiliation in its district name may hint at a particular pedagogical approach, though the data did not provide details on curriculum or classroom structure. Parents interested in specialized programs, advanced coursework at the high school level, or student support services will need to gather that information directly, as the public data leaves those questions open. The combination of a single-campus experience through all grades and a suburban setting may appeal to families seeking continuity, while the missing metrics around graduation and student subgroups invite further inquiry.

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Academic performance

State test results and graduation outcomes.

Graduation rate (ACGR)

80-89%Cohort of 50 students · Class of 2021

The federal source publishes a banded range instead of an exact rate when the graduating cohort is small enough that an exact number could risk identifying individual students.

How this school compares to all schools in this state

Each dot is one school’s SY 2020-21 graduation rate, binned by integer rate. Taller columns mean more schools at that rate. This school is highlighted.

512 schools plotted. 33 additional schools' rates are federally suppressed and not shown. Data: EDFacts SY 2020-21.

Math

Grade 332%

School 32% · District 31% · ▲ 1 pts above district

▼ 12 pts below state median · ▼ 14 pts below county median

Grade 436%

School 36% · District 37% · ▼ 1 pts below district

▼ 8 pts below state median · ▼ 11 pts below county median

Grade 543%

School 43% · District 43%

▲ 1 pts above state median · ▼ 3 pts below county median

Grade 629%

School 29% · District 27% · ▲ 2 pts above district

▼ 7 pts below state median · ▼ 11 pts below county median

Grade 741%

School 41% · District 40% · ▲ 1 pts above district

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

Grade 839%

School 39% · District 37% · ▲ 2 pts above district

▲ 7 pts above state median · ▲ 5 pts above county median

English language arts

Grade 341%

School 41% · District 42% · ▼ 1 pts below district

▲ 1 pts above state median · ▼ 3 pts below county median

Grade 448%

School 48% · District 47% · ▲ 1 pts above district

▲ 1 pts above state median · ▼ 2 pts below county median

Grade 556%

School 56% · District 54% · ▲ 2 pts above district

▲ 15 pts above state median · ▲ 12 pts above county median

Grade 646%

School 46% · District 46%

▲ 3 pts above state median · ▲ 1 pts above county median

Grade 760%

School 60% · District 58% · ▲ 2 pts above district

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

Grade 841%

School 41% · District 39% · ▲ 2 pts above district

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

Science

Grade 545%

School 45% · District 45%

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

Grade 833%

School 33% · District 33%

even with state median · ▼ 2 pts below county median

This schoolSan Tan Montessori School Inc. (89798), 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.