Mountain School
🇺🇸 Official data · 2025Flagstaff, Arizona 86005 · Mountain School Inc. (4203)
#113 of 1,136 elementary schools in Arizona
#7276 of 50,301 nationally
About Mountain School
Mountain School is a charter elementary located in Flagstaff, in the Mountain School Inc. (4203) school district of Arizona, United States. It caters for Grades K–6. In 2025 it enrolled 184 students. Publicly funded charter schools operating under a performance contract; free to attend.
Its Success Index (US) is 76.1 out of 100, placing it in the top 25% of elementary schools in United States and 113th of 1,136 ranked elementary schools in Arizona. Its strongest component is reading proficiency (86th percentile), and its weakest is math proficiency (66th percentile).
Other published figures: enrollment 184.
There are 23 schools in Flagstaff; Mountain School ranks 3rd of 22 scored schools there.
Success Index (US) breakdown
Each component is a percentile against elementary schools across United States.
- Math proficiency (30%)57%
- Reading proficiency (30%)72%
- Community advantage (fewer free/reduced-price lunch) (25%)–
- Students per teacher (15%)10.2
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Mountain School by the official sources.
- Enrollment
- 184
- Students enrolled in the latest NCES directory year.
- Students per teacher
- 10.2
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 72%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 57%
- Share of tested students proficient or above (all students, all grades).
Free academic assessment
Is your child on grade level in reading and math?
Success Tutoring offers personalised English and math tutoring from Kindergarten to Grade 12. Start with a free online assessment and a clear plan for the year ahead.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Centres across NSW, VIC, QLD, WA, SA and ACT
Schools near Mountain School
Closest schools by straight-line distance, with their Success Index (US).
Manuel DeMiguel Elementary School
Flagstaff · Public elementary · Grades PK–5
561 students · 1.2 km away
Lura Kinsey Elementary School
Flagstaff · Public elementary · Grades PK–5
312 students · 2.7 km away
Haven Montessori Charter School
Flagstaff · Charter elementary · Grades K–6
69 students · 3.8 km away
Flagstaff High School
Flagstaff · Public high · Grades 9–12
1,631 students · 4.9 km away
Eva Marshall Elementary School
Flagstaff · Public elementary · Grades PK–6
374 students · 5.2 km away
Montessori Charter School of Flagstaff - Campus
Flagstaff · Charter elementary · Grades K–8
191 students · 5.4 km away
BASIS Flagstaff
Flagstaff · Charter other · Grades K–12
666 students · 6.0 km away
Flagstaff Junior Academy
Flagstaff · Charter elementary · Grades K–8
364 students · 6.0 km away
Charles W Sechrist Elementary School
Flagstaff · Public elementary · Grades PK–5
413 students · 6.8 km away
Sinagua Middle School
Flagstaff · Public middle · Grades 6–8
1,013 students · 7.0 km away
Similar schools
Charter elementary schools in Arizona with a comparable Enrollment.
Montessori Education Centre Charter School - North Campus
Mesa · Charter elementary · Grades K–7
186 students
Milestones Charter School
Phoenix · Charter elementary · Grades K–8
186 students
Glen Canyon Outdoor Academy
Page · Charter elementary · Grades K–8
181 students
Incito Schools
Goodyear · Charter elementary · Grades K–8
179 students
Montessori Charter School of Flagstaff - Campus
Flagstaff · Charter elementary · Grades K–8
191 students
Montessori Day Public Schools Chartered - Mountainside
Phoenix · Charter elementary · Grades K–8
177 students
Frequently asked questions
Is Mountain School a good school?
Mountain School has a Success Index (US) of 76.1 out of 100 (Top 25% of elementary schools in United States) and ranks #113 of 1,136 in Arizona. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Mountain School rank in Arizona?
Mountain School ranks #113 of 1,136 elementary schools in Arizona and #7276 of 50,301 nationally on the Success Index (US) (2025 data).
How many students attend Mountain School?
Mountain School had 184 students in 2025.
Is Mountain School a elementary school or a high school?
Mountain School is classified as a elementary covering Grades K–6. It is a charter school.
What other schools are near Mountain School?
There are 10 schools within 15 km of Mountain School; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.