DfE's 2024/25 A-level Maths value-added data for every Kingston upon Thames sixth form, with each score's confidence interval and entry count.
Book a Free ConsultationKingston upon Thames is a South West London local authority with thirteen state and independent sixth forms. The Department for Education's 2024/25 subject value-added data covers twelve of those providers for A-level Mathematics, and three post a score whose 95% confidence interval sits entirely above zero: Tiffin School, Kingston Grammar School and Richard Challoner School. This page sets out every published score, school by school, alongside how many students each department enters for the subject.
Our expert A-level Maths tutors help students across Kingston upon Thames with both the pure and applied content, whichever exam board their sixth form enters. A programme is built around a student's own specification, current working grade and the topics their school has already covered.
Book a Free Consultation Message us on WhatsAppThe Department for Education publishes A-level subject value-added data by local authority, and Kingston upon Thames (LA code 314, ONS code E09000021) is its own local authority rather than a district inside a larger one. That matters for what this page does and does not cover: Richmond upon Thames, Merton and Surrey are separate local authorities under DfE's own classification, so a sixth form in Twickenham, Wimbledon or Guildford — each within a few miles of Kingston upon Thames — falls outside the sweep behind this page, whatever the map suggests.
Filtering the Department for Education's institution-level subject value-added dataset to local authority 314, the GCE A-level cohort and the Mathematics subject specifically returns thirteen provider rows for the 2024/25 academic year. Twelve are published; one, Coombe Boys' School, is suppressed, and a later section explains why. One of the thirteen is not a conventional secondary school: South Thames Colleges Group, a further education college group, is recorded against this local authority because its campus sits on Kingston Hall Road, in the town centre — confirmed directly against the Department for Education's own Get Information About Schools register, not assumed from the group's name.
Value added compares a department's Mathematics results against pupils nationally who started from a similar point, and the Department for Education publishes it with a 95% confidence interval rather than a single number. A score is only a genuine finding — rather than noise from one year's particular cohort — when the whole interval sits on one side of zero. The table below carries every published score for Kingston upon Thames, sorted by the number of matched entries behind each one rather than by the score itself, because a score built on a cohort of twelve behaves very differently from one built on a cohort of 219.
| Sixth form | Value added | 95% confidence interval | Matched entries | Interval vs zero |
|---|---|---|---|---|
| Tiffin School | 0.36 | 0.19 to 0.52 | 219 | Above zero |
| The Tiffin Girls' School | -0.1 | -0.33 to 0.13 | 112 | Spans zero |
| Kingston Grammar School | 0.48 | 0.21 to 0.76 | 78 | Above zero |
| Coombe Girls' School | -0.21 | -0.49 to 0.07 | 74 | Spans zero |
| Surbiton High School | 0.09 | -0.26 to 0.43 | 49 | Spans zero |
| The Kingston Academy | 0.31 | -0.04 to 0.67 | 46 | Spans zero |
| Richard Challoner School | 0.85 | 0.49 to 1.21 | 45 | Above zero |
| The Holy Cross School | 0.26 | -0.18 to 0.69 | 31 | Spans zero |
| The Hollyfield School and Sixth Form Centre | 0.29 | -0.16 to 0.74 | 29 | Spans zero |
| Tolworth Girls' School and Sixth Form | -0.76 | -1.2 to -0.31 | 29 | Below zero |
| Southborough High School | 0.09 | -0.39 to 0.58 | 25 | Spans zero |
| South Thames Colleges Group | 0.43 | -0.26 to 1.13 | 12 | Spans zero |
| Coombe Boys' School | Suppressed by DfE — see below | |||
Source: Department for Education institution-level subject value-added dataset, GCE A level, Mathematics, local authority 314, 2024/25, re-queried directly against the API on 27 September 2026. Every score above is DfE's value-added progress measure for A-level Mathematics, 2024/25 entrants only, and is not a measure of teaching quality; the final column shows only whether that specific score's own confidence interval is distinguishable from an average year, not a ranking against any other row.
Tiffin School's value-added score for A-level Mathematics is 0.36, with a 95% confidence interval of 0.19 to 0.52 from 219 matched entries; this is DfE's progress measure for 2024/25 entrants and is not a measure of teaching quality.
Kingston Grammar School's value-added score is 0.48, with a 95% confidence interval of 0.21 to 0.76 from 78 matched entries; again, this is DfE's progress measure for 2024/25 entrants and not a measure of teaching quality.
Richard Challoner School's value-added score is 0.85, with a 95% confidence interval of 0.49 to 1.21 from 45 matched entries; this too is DfE's progress measure for 2024/25 entrants and not a measure of teaching quality. Richard Challoner is a non-selective, Catholic voluntary-aided boys' school.
The remaining eight published rows — The Tiffin Girls' School, Surbiton High School, The Kingston Academy, Coombe Girls' School, The Holy Cross School, The Hollyfield School and Sixth Form Centre, Southborough High School and South Thames Colleges Group — each carry a confidence interval that spans zero, meaning the 2024/25 data cannot distinguish that department's Mathematics progress from an average year once its own cohort size is taken into account.
Tolworth Girls' School and Sixth Form's value-added score is -0.76, with a 95% confidence interval of -1.2 to -0.31 from 29 matched entries; this is DfE's progress measure for 2024/25 entrants and not a measure of teaching quality. It is the only Kingston upon Thames row in this dataset whose interval sits entirely below zero.
Whatever a sixth form's own figures above show, our expert A-level Maths tutors work from a student's actual working grade and papers, not from a borough table. Book a short call and we will build a programme around your child's own school and specification.
Book a Free Consultation Message us on WhatsAppThe value-added figures above describe how a department's average pupil progresses; they say nothing about how many pupils that average is drawn from, or how many go on to a second, harder qualification in the same subject. The Department for Education's Compare School and College Performance service publishes exam entry counts separately, by qualification, for every provider — and because it counts entries rather than students, a pupil sitting both A-level Mathematics and A-level Mathematics (Further) appears once in each column. The table below gives, for all thirteen Kingston upon Thames providers, the Mathematics and Mathematics (Further) entries in the same 2024/25 series.
| Sixth form | A-level Maths entries | AS/AEA Maths entries | A-level Further Maths entries | AS Further Maths entries |
|---|---|---|---|---|
| Tiffin School | 219 | — | 94 | 5 |
| The Tiffin Girls' School | 113 | — | 23 | 5 |
| Kingston Grammar School | 80 | 1 AS, 19 AEA | 15 | 10 |
| Coombe Girls' School | 74 | 1 AEA | 10 | — |
| Surbiton High School | 49 | 1 AS | 9 | — |
| The Kingston Academy | 48 | 2 AS | 6 | 13 |
| Richard Challoner School | 45 | 1 AS | 9 | — |
| The Holy Cross School | 32 | 4 AS, 1 AEA | 7 | 1 |
| Tolworth Girls' School and Sixth Form | 30 | — | — | 1 |
| The Hollyfield School and Sixth Form Centre | 29 | 6 AS | 5 | — |
| Southborough High School | 27 | — | 3 | — |
| South Thames Colleges Group | 13 | 29 AS | — | 1 |
| Coombe Boys' School | 1 | — | — | — |
Source: Department for Education, Compare School and College Performance, subjects entered, 16-to-18 results 2024/25, read individually for each of the thirteen providers on 27 September 2026. "AEA" is the Advanced Extension Award in Mathematics, a separate qualification from the A-level. Further Mathematics is reported under its own specification code, not as an extra paper on the Mathematics entry.
Two entry counts stand well apart from the rest of the table. Tiffin School entered 219 candidates for A-level Mathematics and, separately, 94 for A-level Mathematics (Further) in 2024/25. Tolworth Girls' School and Sixth Form entered 30 candidates for A-level Mathematics and 1 for AS-level Mathematics (Further), with no A-level Further Maths entries recorded at all. Richard Challoner School entered 45 for A-level Mathematics and 9 for A-level Mathematics (Further). Kingston Grammar School entered 80 for A-level Mathematics, 1 for AS-level Mathematics, 19 for the Advanced Extension Award in Mathematics, and 15 for A-level Mathematics (Further).
South Thames Colleges Group's pattern runs the other way round: 13 entries for full A-level Mathematics against 29 for AS-level Mathematics in the same year, more AS entries than full A-level entries — the only Kingston upon Thames provider in this table where that is true. The Holy Cross School entered 32 for A-level Mathematics, 4 for AS-level Mathematics and 1 for the Advanced Extension Award; Coombe Girls' School entered 74 for A-level Mathematics and 1 for the Advanced Extension Award alongside 10 for A-level Further Maths.
Coombe Boys' School entered exactly 1 candidate for A-level Mathematics in 2024/25 — the smallest entry of any Kingston upon Thames provider in this table, and the reason its value-added score in the table above is suppressed rather than published.
Coombe Boys' School is the one row in the value-added table above where the Department for Education records the value-added score, its confidence interval and its matched-entry count all as "c" — suppressed. DfE applies small-number suppression across its school performance datasets, and Coombe Boys' School's own subjects-entered table on Compare School and College Performance shows exactly why: it entered a single candidate for A-level Mathematics in 2024/25. A value-added score built from one pupil would say more about that pupil's particular year than about the department, which is why DfE withholds the figure rather than publishing a number that cannot be interpreted safely.
However thin a department's published record, our expert A-level Maths tutors build a programme from a student's own current working grade and papers. Book a short call to talk through your child's Kingston upon Thames sixth form and specification.
Book a Free Consultation Message us on WhatsAppThree things are worth holding in mind before drawing a conclusion from any figure on this page. First, the matched-entry cohorts behind these scores vary a great deal: from 12 at South Thames Colleges Group to 219 at Tiffin School, an eighteen-fold range across the same local authority in the same subject and year. A department's confidence interval widens as its cohort shrinks — the same pattern this page's own table shows across its widest range. Tiffin School's interval is 0.19 to 0.52 from 219 matched entries. South Thames Colleges Group's interval is -0.26 to 1.13 from 12 matched entries.
Second, every score on this page is one year of data, the 2024/25 cohort only. The Department for Education does not publish a multi-year average in this dataset, and a department's score can move meaningfully from one year to the next on a cohort of a few dozen pupils.
Third, value added is scored within a subject and is never comparable across subjects. Mathematics, Mathematics (Further) and Mathematics (Statistics) are three separate rows in DfE's dataset, each with its own score, confidence interval and cohort. A Further Maths entry count on this page says how many pupils a department entered for that separate qualification, not how that department's Further Maths teaching compares against anyone else's — this page carries Further Maths entry counts only, not the separate Further Maths value-added scores DfE publishes alongside them.
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Our expert A-level Maths tutors help students across Kingston upon Thames with both the pure and applied content, whichever exam board their sixth form enters — AQA, Edexcel and OCR are all in use locally. Our national A-level Maths subject page sets out how the three boards' specifications compare; our dedicated AQA A-level Maths, Edexcel A-level Maths and OCR A-level Maths pages cover board-specific paper structure and content, so we do not repeat that detail here. Every programme starts with a short diagnostic against a student's own school and specification, not a generic A-level Maths checklist, so a tutor can see immediately whether the priority is closing a content gap, building exam technique under timed conditions, or working ahead of a school's own scheme of work.
Sessions run one-to-one online, with a shared whiteboard that lets a tutor work through past-paper questions and mark answers against the real mark scheme. Progress is reviewed against a student's own target grade at agreed intervals, and session notes are shared with parents after each lesson. See our full national Maths tuition service for how a programme is structured across a full academic year, our overview of tutoring across Kingston upon Thames for 11+, GCSE and admissions-test support in the same borough, and our Kingston upon Thames GCSE tuition page for younger students still working towards their GCSEs.
All value-added and entry-count figures above are drawn directly from the Department for Education's institution-level subject value-added dataset and its Compare School and College Performance service, re-queried and cross-checked against each provider's own subjects-entered page on 27 September 2026. Every school named above was confirmed open on the Department for Education's Get Information About Schools register the same day this page was published.
Our expert A-level Maths tutors help students across Kingston upon Thames, from Tiffin School and The Tiffin Girls' School to South Thames Colleges Group. Leading Tuition is rated 4.8 out of 5 on Trustpilot from 59 reviews, read on 3 October 2026.
Book a Free Consultation Message us on WhatsAppThree, out of twelve published rows for local authority 314 in 2024/25: Tiffin School (0.36, 95% confidence interval 0.19 to 0.52, 219 matched entries), Kingston Grammar School (0.48, 0.21 to 0.76, 78 matched entries) and Richard Challoner School (0.85, 0.49 to 1.21, 45 matched entries). Each of those intervals sits entirely above zero. One further row, Tolworth Girls' School and Sixth Form, clears the bar in the other direction, at -0.76 (-1.2 to -0.31, 29 matched entries). These are DfE's progress measure for 2024/25 entrants, not a measure of teaching quality.
The Department for Education suppresses the figure — recorded as "c" for the score, its confidence interval and its matched-entry count — because the underlying cohort is too small to publish safely. Coombe Boys' School's own subjects-entered table on Compare School and College Performance shows exactly one candidate entered for A-level Mathematics in 2024/25, the smallest entry of any of the borough's thirteen providers in this dataset.
No. Kingston upon Thames is its own local authority (code 314), separate from Richmond upon Thames (318), Merton (315) and Surrey (936), and the Department for Education publishes this subject value-added dataset by local authority. A sixth form in Twickenham, Wimbledon or Guildford falls outside the sweep behind this page even though each sits within a few miles of Kingston upon Thames. All thirteen providers on this page are registered under local authority 314, including South Thames Colleges Group, whose Kingston Hall Road campus sits inside the borough.
It varies a great deal by school. Tiffin School entered 219 candidates for A-level Mathematics and 94 for A-level Mathematics (Further) in 2024/25. Richard Challoner School entered 45 for A-level Mathematics and 9 for A-level Mathematics (Further). Tolworth Girls' School and Sixth Form entered 30 for A-level Mathematics and just 1 for AS-level Mathematics (Further), with no A-level Further Maths entries recorded. Further Mathematics is reported under its own specification code as a separate qualification, and this page does not publish a value-added score for it.
No. The Department for Education states plainly that value added is a progress measure for that year's entrants, not a measure of teaching quality, and every figure on this page carries that caveat. A score also rests on one year of data and a specific cohort size. South Thames Colleges Group's interval of -0.26 to 1.13 comes from 12 matched entries. Tiffin School's interval of 0.19 to 0.52 comes from 219 matched entries. A wider interval is not a weaker school; it is a smaller, noisier sample.
It varies by school: AQA, Edexcel and OCR are all in use across Kingston upon Thames sixth forms. Our tutors confirm the exact board and specification a student's own sixth form enters before building a programme, because paper structure and content differ between boards. Our national A-level Maths subject page and its three board-specific pages (AQA, Edexcel and OCR) cover how the specifications compare; this page focuses on Kingston upon Thames's own outcome data rather than repeating that detail.
It is the number of exam entries the Department for Education could match to a student's earlier attainment record, which is what a value-added score is calculated from. It usually sits close to, but slightly below, a provider's total A-level Mathematics entry count on Compare School and College Performance — Tiffin School, for example, shows 219 matched entries against 219 A-level Mathematics entries. The Tiffin Girls' School shows 112 matched entries against 113 entries. A handful of entries without a matched prior record are excluded from the value-added calculation but still counted as exam entries.
Our expert A-level Maths tutors help students across Kingston upon Thames build the depth of understanding top grades require, whichever sixth form's table row they are starting from.
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Leading Tuition is rated 4.8 out of 5 on Trustpilot from 59 reviews. See also our overview of tutoring across Kingston upon Thames and our A-level Maths subject page.
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