International Grammar School vs Sydney Secondary College Blackwattle Bay Campus
A head-to-head comparison of two schools in New South Wales, 966 m apart, using official ACARA 2025 data. Best value in each row is highlighted.
International Grammar School
Ultimo · Independent combined · K-12
1,224 students · ICSEA 1170
Sydney Secondary College Blackwattle Bay Campus
Glebe · Government high school · 11-12
798 students · ICSEA 1094
| Measure | International Grammar School Ultimo NSW | Sydney Secondary College Blackwattle Bay Campus Glebe NSW |
|---|---|---|
| Success Index | 82 Top 10% | 77 Top 10% |
| State rank (type) | #32 of 314 | #36 of 539 |
| National rank (type) | #77 of 1,259 | #103 of 1,472 |
| Sector | Independent | Government |
| Type | Combined | Secondary |
| Year range | K-12 | 11-12 |
| Students | 1,224 | 798 |
| Girls / boys | 527 / 697 | 354 / 444 |
| Foundation intake | 60 | – |
| Year 7 cohort | 103 | – |
| Year 12 cohort | 106 | 379 |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | +4% | -1% |
| ICSEA Average 1000 | 1170 | 1094 |
| ICSEA percentile | 98th | 83th |
| Top SEA quarter | 71% | 41% |
| Bottom SEA quarter | 2% | 9% |
| Students per teacher | 9.7 | 11.8 |
| Teaching staff (FTE) | 126.5 | 66.9 |
| Non-teaching staff (FTE) | 55.2 | 17.5 |
| Language background other than English | 26% | 40% |
| Indigenous students | 2% | 3% |
| Suburb | Ultimo 2007 | Glebe 2037 |
| Council area | Sydney | Sydney |
| Remoteness | Major Cities | Major Cities |
| Website | www.igssyd.nsw.edu.au | sscbwattle-h.schools.nsw.gov.au |
The verdict
- •International Grammar School scores higher on the Success Index (81.9 vs 77.4).
- •International Grammar School has the higher ICSEA (1170 vs 1094), indicating a more advantaged community.
- •International Grammar School has fewer students per teacher (9.7 vs 11.8).
- •International Grammar School is the larger school with 1,224 students compared with 798.
- •International Grammar School is a independent school while Sydney Secondary College Blackwattle Bay Campus is a government 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 International Grammar School better than Sydney Secondary College Blackwattle Bay Campus?
On the Success Index, International Grammar School ranks higher (81.9 vs 77.4 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 International Grammar School and Sydney Secondary College Blackwattle Bay Campus?
About 966 m in a straight line, between Ultimo and Glebe in New South Wales.
Which has the better student-to-teacher ratio?
International Grammar School has 9.7 students per full-time-equivalent teacher and Sydney Secondary College Blackwattle Bay Campus has 11.8.
How do International Grammar School and Sydney Secondary College Blackwattle Bay Campus rank in NSW?
International Grammar School is 32nd of 314 and Sydney Secondary College Blackwattle Bay Campus is 36th of 539 among combined schools in New South Wales on the 2025 Success Index.