Back to mapACARA 48158

GovernmentSecondaryYear 07 – Year 12Declining enrolments

SOUTH METROPOLITAN · Major Cities

Thornlie Senior High School

Department of Education Western Australia

Address

2 Ovens Road Thornlie 6108

Thornlie · WA 6108

Gosnells

Get directions →Explore Thornlie →

Phone

Contact number on Schools Online

View contact details →

Website

WA Schools Online

Government school profile & contact

Decision Index

Average · Methodology

ICSEA

969

About average

Students

1,125

Large (600–1,199)

Student ratio

13.8:1

students per teacher

Community

—

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NAPLAN on My School

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Decision Index

Verified ACARA data only — school environment, community context, and peer profile.

Decision Index

Average

Based on verified ACARA school and community data

55% school environment · 45% community context · ACARA + ABS + WA Police verified data

Full methodology →

School environment

Staffing, stability, and resourcing from ACARA School Profile.

Student–teacher ratio

13.8:1

Score 39

More staff per student than 39% of 69 like-schools (ICSEA ±50).

Source: ACARA School Profile 2025; peer group ICSEA ±50

Staffing trend (5yr)

-3.5% ratio change

Score 70

Student–teacher ratio has been relatively stable.

Source: ACARA School Profile 2008–2025

Enrolment stability (5yr)

-3.4%

Score 80

Enrolments have been relatively stable — consistent demand signal.

Source: ACARA School Profile 2008–2025

Teaching staff share

71.4% teaching FTE

Score 86

Higher share of FTE staff in teaching roles than 86% of WA schools.

Source: ACARA School Profile 2025

Community context

Area socio-educational profile — context for who lives nearby, not teaching quality.

ICSEA community advantage

969

Score 33

Community socio-educational advantage at the 33th percentile among WA secondary schools. Context only — not a measure of teaching quality.

Source: ACARA School Profile 2025

ICSEA trend (5yr)

-0.3%

Score 70

Community ICSEA has been relatively stable.

Source: ACARA School Profile 2008–2025

Housing & economic resources

IER 1008 (decile 6)

Score 44

Economic resources index higher than 44% of WA postcode areas (ABS SEIFA IER). Proxy for housing affordability context.

Source: ABS SEIFA 2021 — Postal Area (POA), Index of Economic Resources (IER)

Area safety (police district)

508.9 / 100k

Score 40

Armadale District — lower offence rate than 40% of WA police districts (selected offences, FY to date). District-level indicator, not suburb-specific.

Source: WA Police Force — Crime Statistics 2024-25 (Financial Year to Date)

Peer profile

Who your child learns with — descriptive cohort data, not included in the Decision Index.

LBOTE students

42.0%

81th pct (WA)

42.0% LBOTE — higher than 81% of WA secondary schools. Descriptive cohort data, not a quality rating.

Source: ACARA School Profile 2025

Indigenous students

7.0%

39th pct (WA)

7.0% Indigenous enrolment — cohort composition relative to WA schools.

Source: ACARA School Profile 2025

Top SEA quarter

6.0%

26th pct (WA)

6.0% of students from the top socio-educational advantage quarter — who your child learns alongside.

Source: ACARA School Profile 2025

Planned external data (not yet integrated)

· Median house price (ABS Census — not yet integrated)

We do not show scores for housing or crime until verified open datasets are joined.

Legacy Swan Score (ICSEA 70% + LBOTE 30%): 29 — still available for filtering.

Data insights

What the data tells you

Key facts from ACARA 2025 and historical trends — use alongside school visits and My School NAPLAN.

ICSEA (SES index)Declining -0.3%

969

Student–teacher ratioImproved -3.5%

13.8:1

EnrolmentsDown -3.4%

1,125

800ICSEA 9691300

◎

Large (600–1,199) — 1,125 students enrolled in 2025.

ACARA School Profile 2025

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Student-teacher ratio of 13.8:1 — more staff per student than 39% of 69 like-schools (similar ICSEA background).

ACARA 2025, peer group analysis

◇

42% of students speak a language background other than English at home.

ACARA School Profile 2025

NAPLAN score history is on My School (ACARA). School-level bulk NAPLAN is not in the free download — we link to the official source.

ACARA My School

◉

ICSEA 969 — compare NAPLAN progress against 69 like-schools on My School for fair academic context.

ACARA ICSEA methodology

⊕

Located in Major Cities — SOUTH METROPOLITAN education region.

ACARA School Location 2025

NAPLAN & attendance: View on My School →

All metric trends (ICSEA, LBOTE, enrolments…)

ICSEA (SES index)

969

Declining -0.3%

Index of Community Socio-Educational Advantage (500–1300+). Higher means students typically come from more advantaged backgrounds — use for like-school comparisons, not as a quality score.