Sutherland Dianella Primary School vs Treeby Primary School
A head-to-head comparison of two primary schools in Western Australia, 25 km apart, using official ACARA 2025 data. Best value in each row is highlighted.
Sutherland Dianella Primary School
Dianella · Government primary · K-6
363 students · ICSEA 1083
Treeby Primary School
Treeby · Government primary · K-6
559 students · ICSEA 1083
| Measure | Sutherland Dianella Primary School Dianella WA | Treeby Primary School Treeby WA |
|---|---|---|
| Success Index | 68 Top 25% | 67 Top 25% |
| State rank (type) | #105 of 583 | #114 of 583 |
| National rank (type) | #1200 of 4,908 | #1276 of 4,908 |
| Sector | Government | Government |
| Type | Primary | Primary |
| Year range | K-6 | K-6 |
| Students | 363 | 559 |
| Girls / boys | 168 / 195 | 267 / 292 |
| Foundation intake | 45 | 106 |
| Year 7 cohort | – | – |
| Year 12 cohort | – | – |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | +3% | – |
| ICSEA Average 1000 | 1083 | 1083 |
| ICSEA percentile | 80th | 79th |
| Top SEA quarter | 35% | 33% |
| Bottom SEA quarter | 11% | 10% |
| Students per teacher | 16.0 | 16.9 |
| Teaching staff (FTE) | 21.6 | 30.8 |
| Non-teaching staff (FTE) | 11.1 | 28.5 |
| Language background other than English | 44% | 59% |
| Indigenous students | 2% | 1% |
| Suburb | Dianella 6059 | Treeby 6164 |
| Council area | Stirling | Cockburn |
| Remoteness | Major Cities | Major Cities |
| Website | www.det.wa.edu.au/schoolsonline/overview.do?schoolID=5143 | treebyps.wa.edu.au |
The verdict
- •Both schools have almost identical Success Index scores (68.1 vs 67.2).
- •Sutherland Dianella Primary School has fewer students per teacher (16.0 vs 16.9).
- •Treeby Primary School is the larger school with 559 students compared with 363.
The Success Index summarises community advantage, resourcing and momentum from ACARA data. It does not measure teaching quality, results or fit. Methodology.
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Frequently asked questions
Is Sutherland Dianella Primary School better than Treeby Primary 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 Sutherland Dianella Primary School and Treeby Primary School?
About 25 km in a straight line, between Dianella and Treeby in Western Australia.
Which has the better student-to-teacher ratio?
Sutherland Dianella Primary School has 16.0 students per full-time-equivalent teacher and Treeby Primary School has 16.9.
How do Sutherland Dianella Primary School and Treeby Primary School rank in WA?
Sutherland Dianella Primary School is 105th of 583 and Treeby Primary School is 114th of 583 among primary schools in Western Australia on the 2025 Success Index.