Gawler and District College B-12 vs Trinity College Senior
A head-to-head comparison of two schools in South Australia, 1.5 km apart, using official ACARA 2025 data. Best value in each row is highlighted.
Gawler and District College B-12
Evanston · Government combined · U, R-12
1,247 students · ICSEA 932
Trinity College Senior
Evanston South · Independent high school · 11-12
669 students · ICSEA 1025
| Measure | Gawler and District College B-12 Evanston SA | Trinity College Senior Evanston South SA |
|---|---|---|
| Success Index | 21 Lower 50% | 59 Top 50% |
| State rank (type) | #143 of 145 | #26 of 84 |
| National rank (type) | #1234 of 1,259 | #544 of 1,472 |
| Sector | Government | Independent |
| Type | Combined | Secondary |
| Year range | U, R-12 | 11-12 |
| Students | 1,247 | 669 |
| Girls / boys | 607 / 640 | 339 / 330 |
| Foundation intake | 61 | – |
| Year 7 cohort | 141 | – |
| Year 12 cohort | 142 | 329 |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | -1% | +18% |
| ICSEA Average 1000 | 932 | 1025 |
| ICSEA percentile | 19th | 58th |
| Top SEA quarter | 3% | 13% |
| Bottom SEA quarter | 59% | 24% |
| Students per teacher | 13.8 | 11.4 |
| Teaching staff (FTE) | 90.6 | 58.8 |
| Non-teaching staff (FTE) | 56.4 | 23.8 |
| Language background other than English | 10% | 21% |
| Indigenous students | 12% | 2% |
| Suburb | Evanston 5116 | Evanston South 5116 |
| Council area | Gawler | Gawler |
| Remoteness | Major Cities | Major Cities |
| Website | www.gdc.sa.edu.au | www.trinity.sa.edu.au |
The verdict
- •Trinity College Senior scores higher on the Success Index (58.9 vs 21.0).
- •Trinity College Senior has the higher ICSEA (1025 vs 932), indicating a more advantaged community.
- •Trinity College Senior has fewer students per teacher (11.4 vs 13.8).
- •Gawler and District College B-12 is the larger school with 1,247 students compared with 669.
- •Trinity College Senior has grown faster over five years (18% vs -1%).
- •Gawler and District College B-12 is a government school while Trinity College Senior is an independent 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.
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Frequently asked questions
Is Gawler and District College B-12 better than Trinity College Senior?
On the Success Index, Trinity College Senior ranks higher (58.9 vs 21.0 out of 100). The index measures community advantage and momentum from ACARA data, not teaching quality, so visit both schools before deciding.
How far apart are Gawler and District College B-12 and Trinity College Senior?
About 1.5 km in a straight line, between Evanston and Evanston South in South Australia.
Which has the better student-to-teacher ratio?
Gawler and District College B-12 has 13.8 students per full-time-equivalent teacher and Trinity College Senior has 11.4.
How do Gawler and District College B-12 and Trinity College Senior rank in SA?
Gawler and District College B-12 is 143rd of 145 and Trinity College Senior is 26th of 84 among combined schools in South Australia on the 2025 Success Index.