Aspect Treetop School vs St Thomas' School
A head-to-head comparison of two schools in South Australia, 1.6 km apart, using official ACARA 2025 data. Best value in each row is highlighted.
Aspect Treetop School
Ashford · Independent special · U
75 students · ICSEA 1080
St Thomas' School
Goodwood · Catholic primary · R-6
297 students · ICSEA 1116
| Measure | Aspect Treetop School Ashford SA | St Thomas' School Goodwood SA |
|---|---|---|
| Success Index | – Not rated | 72 Top 25% |
| State rank (type) | – | #50 of 348 |
| National rank (type) | – | #878 of 4,908 |
| Sector | Independent | Catholic |
| Type | Special | Primary |
| Year range | U | R-6 |
| Students | 75 | 297 |
| Girls / boys | 16 / 59 | 142 / 155 |
| Foundation intake | – | 44 |
| Year 7 cohort | – | – |
| Year 12 cohort | – | – |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | +15% | -22% |
| ICSEA Average 1000 | 1080 | 1116 |
| ICSEA percentile | 79th | 88th |
| Top SEA quarter | 34% | 44% |
| Bottom SEA quarter | 13% | 4% |
| Students per teacher | 3.7 | 14.7 |
| Teaching staff (FTE) | 20.2 | 20.2 |
| Non-teaching staff (FTE) | 22.4 | 13.0 |
| Language background other than English | 32% | 11% |
| Indigenous students | 1% | 0% |
| Suburb | Ashford 5035 | Goodwood 5034 |
| Council area | West Torrens | Unley |
| Remoteness | Major Cities | Major Cities |
| Website | www.autismspectrum.org.au/treetop | www.stg.catholic.edu.au |
The verdict
- •St Thomas' School has the higher ICSEA (1116 vs 1080), indicating a more advantaged community.
- •Aspect Treetop School has fewer students per teacher (3.7 vs 14.7).
- •St Thomas' School is the larger school with 297 students compared with 75.
- •Aspect Treetop School has grown faster over five years (15% vs -22%).
- •Aspect Treetop School is a independent school while St Thomas' School is a catholic school, so fees and enrolment rules differ.
The Success Index summarises community advantage, resourcing and momentum from ACARA data. It does not measure teaching quality, results or fit. Methodology.
Free academic assessment
Torn between two schools? Start with your child.
Whichever you choose, a free Success Tutoring assessment shows exactly where your child is in English and Maths and how to get ahead before the next school year.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Your nearest centre: Success Tutoring Windsor Gardens
Frequently asked questions
Is Aspect Treetop School better than St Thomas' School?
The two schools are very close on the Success Index. Differences in sector, size, year range and distance from home will matter more than the score.
How far apart are Aspect Treetop School and St Thomas' School?
About 1.6 km in a straight line, between Ashford and Goodwood in South Australia.
Which has the better student-to-teacher ratio?
Aspect Treetop School has 3.7 students per full-time-equivalent teacher and St Thomas' School has 14.7.
How do Aspect Treetop School and St Thomas' School rank in SA?
Aspect Treetop School is unranked and St Thomas' School is 50th of 348 among special schools in South Australia on the 2025 Success Index.