St Teilo's C.I.W. High School

Secondary · ages 11-19Church in Wales1,375 pupilsSixth formCardiff

School Chooser Score

Above
similar schools

Likely range 61 to 75

Out of 100. Better than 86% of the 50 schools most like it. Much the same over the last five years.

Best nine GCSE grades score377Wales 366

Attendance89.9%Wales 89.6%

Pupils from low-income families30%Wales 20%

Pupils with additional learning needs4%Wales 11%

Pupils on roll1,375

NeighbourhoodAmong the poorest areasWelsh Index of Multiple Deprivation 2025

St Teilo's C.I.W. High School is a Church in Wales school (voluntary aided) in Cardiff for pupils aged 11 to 19. It has 1,375 pupils. We give it 67 out of 100. That puts it above schools like it, ahead of 86% of the 50 schools most like it. Teaching is in English.

Circle Way East, Llanedyern, Cardiff, CF23 9PD029 2054 7180All details

Inspection

Schools in Wales are inspected by Estyn, not Ofsted. Since September 2022 Estyn's reports describe what a school does well and what it needs to work on, without giving a grade.

Estyn's latest report, and any follow-up visits, are on Estyn's website. The only schools given a formal label are those in special measures or needing significant improvement.

Find this school's Estyn reports My Local School (Welsh Government)

Results

GCSE results, summer 2025

Wales scores GCSEs in points rather than counting passes. Here is how the school compares with all secondaries in Wales.

Best nine GCSE grades score377

Wales 366

Official name: Capped 9 points score (interim)

English or Welsh score40.3

Wales 39.9

Official name: Literacy points score

Maths score36.5

Wales 36.9

Official name: Numeracy points score

Science score37.9

Wales 37.0

Official name: Science points score

Trend

Best nine GCSE grades score

2023 to 2025

Since 2023: +9Steady overall

All GCSE measures, year by year

Measure	2025	2024	2023	Cardiff	Wales
Best nine GCSE grades scoreCapped 9 points score (interim)	377	370	367	380	366
English or Welsh scoreLiteracy points score	40.3	40.2	42.6	41.4	39.9
Maths scoreNumeracy points score	36.5	36.1	38.7	39.2	36.9
Science scoreScience points score	37.9	36.2	40.0	38.3	37.0
Welsh Baccalaureate scoreSkills Challenge Certificate points score	0.0	0.0	0.0	21.6	31.6
Best nine GCSE score: low-income pupilsCapped 9, eligible for free school meals	345	331	339	336	308

Interim measures published by the Welsh Government; no measures were published for 2020 to 2022.

Does every child do well here?

A good school does well by every child, not just on average. Each row compares two groups of pupils here. The grey marks show the same two groups across England. 1 of the 4 gaps is smaller than the gap across England. When a group has fewer than about ten pupils, its figures jump around a lot from year to year.

At GCSE, 2025

Best nine GCSE grades scoreLow-income pupils vs all pupils

344.6376.8

Gap 32.2England 57.9

Literacy pointsLow-income pupils vs all pupils

36.340.3

Gap 4.0

Numeracy pointsLow-income pupils vs all pupils

31.336.5

Gap 5.2

Science pointsLow-income pupils vs all pupils

31.637.9

Gap 6.3

First groupSecond groupEngland, each group

Low-income means the child gets free school meals. The Welsh figures are averaged over three years, and the grey marks show Wales rather than England.

Getting a place

There is no entrance test. The council hands out the places. Brothers and sisters of current pupils and other priority groups go first; after that, the closer you live, the better your chances. As a Church in Wales school it may put families of that faith first.

Teaching is in English.

You apply through Cardiff council, not the school.

Who goes here

Who a school teaches matters. That is why our score compares it with schools that take in a similar mix of children, not with every school in the country.

Pupils on roll1,375

Pupils from low-income families30%Three-year average; Wales 20%

Pupils getting extra support4%Additional learning needs; Wales 11%

Pupils learning English8%First language is not English or Welsh

Black, Asian and minority ethnic pupils43%

LanguageEnglish mediumEnglish medium school / provision

NeighbourhoodAmong the poorest areasIf Wales's neighbourhoods were split into ten groups from poorest to wealthiest, this one is in group 1 (Welsh Index of Multiple Deprivation 2025)

How the mix of pupils has changed

Year	2025	2024	2023	2022	2021	2020
Pupils from low-income familiesFree school meals	29.7%	31.7%	30.7%	27.7%	24.5%	22.3%
Pupils getting extra supportAdditional learning needs (ALN)	4.1%	8.9%	9.7%	9.4%	17.1%	18.4%
Pupils learning EnglishEnglish as an additional language	7.9%	7.0%	7.9%	7.5%	7.4%	6.8%
Black, Asian and minority ethnic pupilsBAME pupils	43.4%	39.4%	38.8%	37.4%	34.7%	34.0%

Attendance

In 2024/25 pupils were in school 89.9% of the time. Across secondary schools in Wales it was 89.6%. Wales doesn't publish figures on pupils who miss a lot of school, or on exclusions, for individual schools.

Attendance89.9%

Wales 89.6%

Official name: 100 minus overall absence

Trend

Attendance

2019 to 2025

Since 2019: -3.7%Steady overall

Staff and budget

From the Welsh Government's My Local School, 2025/26.

Budget per pupil£5,8792025/26, Wales £5,956

Trend

Budget per pupil (£)

2020 to 2026

Since 2020: +1,169Steady overall

The budget is the money the council gave the school to spend per pupil in 2025/26, £77 less than the Welsh average for secondary schools. Small and rural schools tend to get more per pupil.

The area around the school

Crimes within 500 m27212 months to June 2026, mostly violence and sexual offences

Local crime rate76 per 1,000 people16% lower than the England average

Typical house price£269,475Cardiff

Nearest bus stop60 mSt Teilo's School, 7 stops within 500 m

Crime figures come from police.uk. The police record each crime at the nearest of a fixed set of map points rather than the exact spot, so “within 500 m” is only rough. House prices are from HM Land Registry sales nearby over the last two years.

Nearby schools

The closest secondary schools, nearest first. Hover over a row to see it on the map.

Well aboveAboveIn lineBelowWell belowNot scored

School	Type	Distance	Pupils	Ofsted	Score
Ysgol Gyfun Gymraeg Bro Edern	Council	0.8 miles	935	Estyn, no grade	61	Compare
Eastern High	Council	1.2 miles	1,185	Estyn, no grade	4	Compare
Cardiff High School	Council	1.3 miles	1,794	Estyn, no grade	99	Compare
St Illtyds R.C. High School	Roman Catholic	1.4 miles	990	Estyn, no grade	73	Compare
Corpus Christi Catholic High School	Roman Catholic	1.6 miles	1,132	Estyn, no grade	95	Compare
Willows High School	Council	2.0 miles	809	Estyn, no grade	35	Compare
Cathays High School	Council	2.2 miles	1,247	Estyn, no grade	88	Compare
Llanishen High School	Council	2.3 miles	1,715	Estyn, no grade	90	Compare

Secondary schools in Cardiff Best secondary schools in Wales

Compared with schools like it

Our score compares St Teilo's C.I.W. High School with the 50 schools in Wales whose pupils are most like its own. We match on family income, how many children are learning English, special needs, the neighbourhood, the size of the school and how it admits pupils. Those 50 schools are dotted all over the country, so we don't list them. What matters is where this school sits among them.

Beats86%of schools with a similar mix of pupils

In the top quarter of its group. Its score of 67 is 25 points above the typical school in the group.

0Lowest of the group 2 · middle 42 · highest 91100

Nearby schools with a similar mix of pupils that score higher

Of those 50 schools, these are within 25 km and score at least five points more than St Teilo's C.I.W. High School, nearest first. A school with the same kind of pupils and a higher score is the fairest sign that it gets more out of them.

School	Type	Distance	Pupils	Ofsted	Score
St Illtyds R.C. High School	Roman Catholic	1.4 miles	990	Estyn, no grade	73	Compare
Mary Immaculate R.C. High School	Roman Catholic	5.9 miles	871	Estyn, no grade	89	Compare
Cardinal Newman R.C. Comprehensive School	Roman Catholic	8.5 miles	980	Estyn, no grade	91	Compare
St Alban's R.C. High School	Roman Catholic	14.0 miles	824	Estyn, no grade	79	Compare

How the score was worked out

The score is out of 100. A 67 means that once everything below is added up, this school comes out ahead of 67% of secondary schools in Wales. Results bounce around from year to year, especially in small schools, so we also show a likely range: 61 to 75. Every part is judged against schools with a similar mix of pupils. For small schools we pull each part towards the group average, so one unusual year can't swing the score too far.

What we looked at	How much it counts	Against schools like it	Effect on the score	Based on
Results over three years	40%	in line	+0.03	2025, 2024 and 2023 results; 275 pupils
Results, allowing for the mix of pupils	25%	well above	+0.25	Attainment relative to schools with a similar intake; 275 pupils
Attendance and behaviour	20%	in line	+0.02	2024/25; 1,375 pupils
Direction of travel over five years	15%	in line	+0.01	results and attendance rising year on year

Worked out on 13 September 2026 (method v1). Read how the score works, including every weight and the checks we run. Think a number is wrong? Tell us.

Questions parents ask

Is St Teilo's C.I.W. High School a good school?

Yes, going by the figures. St Teilo's C.I.W. High School scores 67 out of 100. That is above schools that take in a similar mix of pupils, and ahead of 86% of the 50 schools most like it in Wales. The score could fairly be anywhere from 61 to 75, so a few points either way between schools doesn't mean much.

How many pupils does St Teilo's C.I.W. High School have?

1,375 pupils aged 11 to 19.

Does St Teilo's C.I.W. High School have a sixth form?

Yes.

These answers come straight from the figures on this page and update when new data comes out.

Contact and details

Address: Circle Way East, Llanedyern, Cardiff, CF23 9PD
Telephone: 029 2054 7180
Type of school: Church in Wales school (voluntary aided) (Voluntary aided school, local authority maintained schools)
Phase: Secondary school, ages 11-19, with sixth form
Religious character: Church in Wales
Local authority: Cardiff
Ward: Pentwyn
Constituency: Cardiff East
Setting: Urban: Nearer to a major town or city
URN: 401890 · School number 6814609 · UKPRN 10008850
Language: English medium school / provision

Official record My Local School Download this school's data (CSV)

Recent changes

13 September 2026PhaseCode changed from “Secondary” to “Other”
13 September 2026TypeCode changed from “Voluntary aided school” to “Welsh establishment”
13 September 2026Pupil numbers changed from “1375” to “–”
13 September 2026Free school meals % changed from “29.7” to “–”
13 September 2026ReligiousCharacter changed from “Church in Wales” to “–”

Where these figures come from

School details: Department for Education Get Information About Schools and the Welsh Government address list of schools (this page rebuilt 13 September 2026).
Results, attendance, pupils, staff and budget: Welsh Government, My Local School, latest data to 2026.
Neighbourhood deprivation: Welsh Index of Multiple Deprivation 2025 postcode lookup.
All under the Open Government Licence v3.0. Full list and update calendar.