The Hills Montessori School
Updated Oct 2026 · ACARA 2025Aldgate, South Australia 5154 · Adelaide Hills LGA
#17 of 145 combined schools in SA
#302 of 1,259 nationally
About The Hills Montessori School
The Hills Montessori School is an independent combined (K–12) school located in Aldgate, South Australia (5154), within the Adelaide Hills local government area. It caters for students from R to 9 and in 2025 enrolled 133 students (76 girls and 57 boys). The school is affiliated with Association of Independent Schools of SA.
The Hills Montessori School has an ICSEA value of 1105, indicating very high socio-educational advantage. That places it in the 86th percentile of Australian schools. 45% of students come from the top socio-educational quarter and 9% from the bottom quarter.
The school employs 24 teachers (12.5 full-time equivalent) and 28 non-teaching staff, giving a student-to-teacher ratio of about 10.6 to 1. Enrolments have fallen by 24% over the past five years.
On the Success Index, The Hills Montessori School scores 68.1 out of 100, placing it in the top 25% of combined schools nationally and 17th of 145 combined schools in SA (1st of 4 in the Adelaide Hills area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1105
- Students in the top advantage quarter (15%)45% of students
- Teacher resourcing (students per teacher) (15%)10.6 students per teacher
- Enrolment growth vs local area (5 years) (10%)-24% enrolments since 2020 (area median +16%)
- ICSEA trend (5 years) (10%)+9 ICSEA points since 2020
The Success Index summarises the academic environment of a school community using official ACARA data. It is not a measure of teaching quality or student results. Read the methodology.
Student profile
Distribution of students across socio-educational advantage (SEA) quarters, plus community characteristics.
Enrolments by year level
How The Hills Montessori School's 133 students are spread across year levels in 2025.
Enrolment trend
How enrolments at The Hills Montessori School have changed over the past decade.
Free academic assessment
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Schools near The Hills Montessori School
Closest schools by straight-line distance, with their Success Index.
Aldgate Primary School
Aldgate · Government primary · R-6
253 students · ICSEA 1092 · 736 m away
Bridgewater Primary School
Bridgewater · Government primary · R-6
197 students · ICSEA 1076 · 1.5 km away
Stirling East Primary School
Stirling · Government primary · R-6
516 students · ICSEA 1138 · 1.7 km away
Heathfield Primary School
Heathfield · Government primary · R-6
102 students · ICSEA 1071 · 2.7 km away
Mylor Primary School
Mylor · Government primary · R-6
33 students · ICSEA 974 · 3.3 km away
Heathfield High School
Heathfield · Government high school · 7-12
970 students · ICSEA 1086 · 3.4 km away
The Hills Christian Community School
Verdun · Independent combined · R-12
640 students · ICSEA 1092 · 3.5 km away
St Catherine's School
Stirling · Catholic primary · R-6
185 students · ICSEA 1133 · 3.7 km away
Crafers Primary School
Crafers · Government primary · R-6
221 students · ICSEA 1109 · 3.9 km away
Hahndorf Primary School
Hahndorf · Government primary · R-6
166 students · ICSEA 1049 · 5.9 km away
Similar schools
Independent combined schools in SA with a comparable ICSEA.
Pedare Christian College
Golden Grove · Independent combined · R-12
1,146 students · ICSEA 1097
Southern Montessori School
O'Sullivan Beach · Independent combined · R-9
230 students · ICSEA 1095
The Hills Christian Community School
Verdun · Independent combined · R-12
640 students · ICSEA 1092
Sunrise Christian School Marion
Marion · Independent combined · R-9
320 students · ICSEA 1090
Cedar College
Northgate · Independent combined · R-12
884 students · ICSEA 1090
King's Baptist Grammar School
Wynn Vale · Independent combined · R-12
1,280 students · ICSEA 1090
Frequently asked questions
Is The Hills Montessori School a public or private school?
The Hills Montessori School is a Independent school, which makes it a non-government (private) school affiliated with Association of Independent Schools of SA.
What year levels does The Hills Montessori School offer?
The Hills Montessori School offers R to 9. It is classified by ACARA as a combined school.
How many students attend The Hills Montessori School?
In 2025, The Hills Montessori School had 133 enrolled students (76 girls, 57 boys), a change of -24% over five years.
What is the ICSEA of The Hills Montessori School?
The Hills Montessori School has an ICSEA (Index of Community Socio-Educational Advantage) of 1105. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does The Hills Montessori School rank in SA?
The Hills Montessori School ranks 17th of 145 combined schools in South Australia on the Success Index (68.1/100), and 302nd of 1,259 nationally.
What is the student-to-teacher ratio at The Hills Montessori School?
The Hills Montessori School has about 10.6 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at The Hills Montessori School?
In 2025, The Hills Montessori School had 5 students in Year 7.
Is The Hills Montessori School co-ed?
Yes. The Hills Montessori School is a co-educational school enrolling both girls and boys.
What other schools are near The Hills Montessori School?
There are 10 other schools within 15 km of The Hills Montessori School in our database. Scroll up to the "Nearby schools" section to compare them by Success Index, ICSEA and enrolments, or use the Compare tool.
Where can I get tutoring near The Hills Montessori School?
The closest Success Tutoring centre is Success Tutoring Windsor Gardens, about 19 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.