J J Cahill Memorial High School vs St Joseph's Catholic Primary School
A head-to-head comparison of two schools in New South Wales, 1.3 km apart, using official ACARA 2025 data. Best value in each row is highlighted.
J J Cahill Memorial High School
Mascot · Government high school · 7-12
298 students · ICSEA 987
St Joseph's Catholic Primary School
Rosebery · Catholic primary · K-2
150 students · ICSEA 1112
| Measure | J J Cahill Memorial High School Mascot NSW | St Joseph's Catholic Primary School Rosebery NSW |
|---|---|---|
| Success Index | 53 Top 50% | 80 Top 5% |
| State rank (type) | #259 of 539 | #47 of 1,619 |
| National rank (type) | #678 of 1,472 | #195 of 4,908 |
| Sector | Government | Catholic |
| Type | Secondary | Primary |
| Year range | 7-12 | K-2 |
| Students | 298 | 150 |
| Girls / boys | 128 / 170 | 78 / 72 |
| Foundation intake | – | 56 |
| Year 7 cohort | 54 | – |
| Year 12 cohort | 38 | – |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | -7% | – |
| ICSEA Average 1000 | 987 | 1112 |
| ICSEA percentile | 41th | 87th |
| Top SEA quarter | 9% | 47% |
| Bottom SEA quarter | 39% | 4% |
| Students per teacher | 7.6 | 14.7 |
| Teaching staff (FTE) | 39.3 | 10.2 |
| Non-teaching staff (FTE) | 11.6 | 3.6 |
| Language background other than English | 66% | 69% |
| Indigenous students | 7% | 3% |
| Suburb | Mascot 2020 | Rosebery 2018 |
| Council area | Bayside (NSW) | Sydney |
| Remoteness | Major Cities | Major Cities |
| Website | jjcahill-h.schools.nsw.gov.au | stjrosebery.syd.catholic.edu.au/ |
The verdict
- •St Joseph's Catholic Primary School scores higher on the Success Index (79.9 vs 52.9).
- •St Joseph's Catholic Primary School has the higher ICSEA (1112 vs 987), indicating a more advantaged community.
- •J J Cahill Memorial High School has fewer students per teacher (7.6 vs 14.7).
- •J J Cahill Memorial High School is the larger school with 298 students compared with 150.
- •J J Cahill Memorial High School is a government school while St Joseph's Catholic Primary 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 Rockdale
Frequently asked questions
Is J J Cahill Memorial High School better than St Joseph's Catholic Primary School?
On the Success Index, St Joseph's Catholic Primary School ranks higher (79.9 vs 52.9 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 J J Cahill Memorial High School and St Joseph's Catholic Primary School?
About 1.3 km in a straight line, between Mascot and Rosebery in New South Wales.
Which has the better student-to-teacher ratio?
J J Cahill Memorial High School has 7.6 students per full-time-equivalent teacher and St Joseph's Catholic Primary School has 14.7.
How do J J Cahill Memorial High School and St Joseph's Catholic Primary School rank in NSW?
J J Cahill Memorial High School is 259th of 539 and St Joseph's Catholic Primary School is 47th of 1,619 among secondary schools in New South Wales on the 2025 Success Index.