Altrincham Grammar School for Girls Sixth Form Entry

Altrincham Grammar School for Girls (AGGS) is a selective girls' grammar school in Bowdon, Trafford, whose sixth form admits external Year 12 applicants against a minimum of four GCSEs at grade 7 or above and two at grade 6. The Department for Education records its gender of entry as Girls, and existing AGGS pupils get first priority in its own oversubscription order, with outside applicants ranked afterwards by catchment.

We prepare Year 11 students from other schools for exactly this route: raising the specific GCSE grades AGGS asks for, building the evidence an application needs before the January deadline, and making sure a family knows, honestly, where they stand before they commit months of work to an application. This page sets out what AGGS actually requires and how our sixth form preparation programme is built around it.

Does AGGS Take External Candidates Into Its Sixth Form — And Does It Take Boys?

Two questions decide whether this route is worth pursuing at all, and AGGS's own website answers neither of them directly. The first is whether a girl currently at another school can apply. She can: AGGS's sixth form admissions page describes an application process for "all applications to the sixth form, including students currently at AGGS" — wording that only makes sense if the majority of applicants are not currently at AGGS — and the school separately publishes a document titled for external candidates alongside its general Sixth Form Prospectus. External entry is real, not a theoretical option buried in small print.

The second question is whether AGGS's sixth form remains girls-only, because a number of single-sex grammar schools around the country quietly go co-educational at 16+ and a family with a son could otherwise waste months preparing for a route that was never open to him. AGGS does not. The Department for Education's Get Information about Schools register — the official national database of every state school in England — lists AGGS's gender of entry as "Girls" for the whole of its 11-to-18 age range, with no separate sixth form designation. Every AGGS document we reviewed for this page, from the general prospectus to the pastoral care sections, addresses girls and daughters throughout; nothing in the school's own material describes a mixed sixth form.

What is worth understanding, in place of a guaranteed place, is how AGGS ranks applicants once it has more of them than places. Its own published order puts existing AGGS Year 11 pupils first, ahead of any external applicant, however strong. After that come looked-after and previously looked-after children, then two tiers of catchment-based priority. An external applicant is not competing on GCSE grades alone against other external applicants in a vacuum — she is competing for whatever places remain once AGGS's own cohort has progressed internally, and then within a defined order behind other categories of applicant. That does not make external entry unrealistic; the school clearly expects and processes a meaningful number of outside applications every year. It does mean the honest starting point for any family is understanding the order, not assuming a fixed quota exists.

What GCSE Grade Profile Does AGGS Require For Sixth Form Entry?

AGGS states its overall academic bar plainly: a minimum of four GCSE passes at grade 7 or above, plus two further GCSE passes at grade 6, is required before a Sixth Form place is considered at all. This is a whole-profile requirement, not a "best six results" calculation — it sits alongside, not instead of, a separate and non-negotiable rule that every student entering the sixth form must hold at least a grade 6 in GCSE English language and in GCSE mathematics, whatever A-level subjects she intends to study. A student with five grade 8s and 9s but a grade 5 in GCSE maths does not meet the school's stated minimum, regardless of her overall average.

Layered on top of that general profile is a further, subject-specific rule: AGGS requires a grade 7, 8 or 9 in the GCSE subject relevant to each A-level a student wants to study. This is where a strong-looking set of results can still fall short of a specific course. A student aiming for A-level Chemistry with a grade 6 in GCSE chemistry meets AGGS's general four-at-7 bar comfortably on her other subjects, but does not clear the subject-specific threshold for that particular A-level unless her double or triple science grades qualify a different way. The two requirements — the whole-profile minimum and the per-subject threshold — have to be checked separately, and it is the second one families most often overlook.

AGGS also confirms, in its own sixth form guidance, that all subject combinations are considered rather than being restricted to fixed blocks or pathways, which gives an external applicant more flexibility in how she puts a subject choice together around her strongest GCSE grades — provided each individual choice clears its own bar.

Which GCSE Grade Does Each A-Level Subject Require?

AGGS publishes a full table of the GCSE grade each A-level subject requires, and it is the single most useful document for a family trying to work out which combination of three subjects is realistically open to a given set of predicted grades. The requirements below are reproduced from AGGS's own sixth form admissions page.

Two patterns are worth noticing here. First, subjects with no direct GCSE equivalent — Economics, Business, Psychology — accept a grade 7 in a related subject instead, which opens those A-levels to students whose strongest GCSEs sit in mathematics or English rather than in a subject they have never formally studied. Second, the science subjects accept either the single-science grade or an equivalent 7-7 in the two GCSEs that make up combined science, which matters for a student who took trilogy rather than triple science at GCSE.

How Does AGGS Decide Between External Applicants?

AGGS's sixth form currently holds over 350 students across Years 12 and 13, run from a dedicated Sixth Form Centre at Green Courts, a short distance from the main Cavendish Road site. Unlike some neighbouring grammar schools, AGGS does not publish a numeric target for how many of those places go to external candidates each year, and it does not run a separate entrance examination or interview to rank them. Decisions rest entirely on the documentary evidence submitted with the application: predicted GCSE grades on headed paper from the applicant's current school, subject choices and a short personal statement.

Where AGGS is explicit is on the order applicants are considered in once demand for a subject or for places generally exceeds supply. Existing AGGS pupils are prioritised first, ahead of any external application. After that, the order runs: applicants who are looked after or previously looked after; applicants within the catchment area who are also eligible for the pupil premium; applicants within the catchment area who will have a sister already at the school; and applicants within the catchment area generally. An external applicant living outside AGGS's catchment area, with no sibling connection and not eligible for pupil premium, sits behind every one of those categories — which is precisely why meeting the GCSE thresholds comfortably, rather than marginally, is what an external applicant actually controls.

Exceptions to the standard grade requirements can be considered by appeal in specific circumstances such as illness, bereavement or an equivalent qualification not covered by the standard grading system — but AGGS treats this as an exception process, not a routine second chance, and it is not something an application strategy should be built around from the outset.

When Do Applications Open And Close For September 2026 Entry?

For entry in September 2026, AGGS's application window opened on Friday 14 November 2025 and closes at 3.30pm on Friday 9 January 2026. The school states plainly that late applications will not be accepted under any circumstances, which makes the January deadline a hard stop rather than a guideline. Applications, for both external and internal candidates, are made through the same online system at aggs.applicaa.com, where an applicant records her personal details, her chosen A-level subjects, her predicted GCSE grades and a short personal statement.

The predicted-grades requirement is where external applications most often stall. AGGS is explicit that it will not contact another school on an applicant's behalf to obtain this evidence — the predicted grades have to arrive on the current school's own headed paper, supplied by the family, before the application can be considered complete. For a family only starting to think about AGGS in December, that can mean requesting predictions from a current school with very little runway before the 9 January cut-off. Starting the request process in the autumn term, well before the deadline, is the single most avoidable failure point in an otherwise straightforward application.

Our Year 11 Preparation Programme For AGGS Sixth Form Entry

We build a preparation programme around AGGS's own published bar, not a generic sixth-form-entry course. That starts with mapping a student's current GCSE trajectory subject by subject against the exact thresholds AGGS sets — the whole-profile four-at-7 requirement, the English and mathematics grade 6 floor, and the specific per-subject grade needed for each A-level she wants to study — so a family knows early which grades are already secure and which still need work before predictions are finalised.

Where a subject sits below AGGS's threshold, our subject specialists work through GCSE content and past-paper technique to move it, prioritising the subjects that gate her intended A-level choices rather than spreading effort evenly across every GCSE. A student targeting AGGS Chemistry with a grade 6 needs a different plan to one targeting AGGS Economics on the strength of a grade 8 in mathematics, and we build the programme around her specific subject mix rather than a standard revision timetable. Our GCSE maths tuition and GCSE English tuition cover the two subjects every AGGS applicant needs at grade 6 regardless of her chosen A-levels, and sit alongside subject-specific support for whichever GCSEs gate her particular course choices; the full range is on our GCSE tuition page.

Because AGGS's process runs on documentary evidence rather than an interview, we also help a family assemble that evidence properly and early: requesting predicted grades from the current school well ahead of the 9 January deadline, working through subject choices against the AGGS table above rather than a generic sixth form list, and reviewing the personal statement so it reads as a genuine account of why AGGS specifically, rather than a template response. None of this changes what AGGS decides — the school's own oversubscription order still applies, and we are candid with families when a subject or an overall profile is not yet within reach — but it removes the avoidable reasons an otherwise qualified application falls short.

Results Families Can Check

91% of our students achieve their desired grades, a first-party outcome figure we publish and stand behind rather than a projection. We are rated 4.8 out of 5 from 57 reviews on Trustpilot, read 21 August 2026, which families are welcome to verify independently rather than take on trust from our own site.

Frequently Asked Questions

This page covers 16+ entry into AGGS's sixth form only. For girls applying at age 11, see our Altrincham Grammar School for Girls 11+ entry guide, and browse our other 16+ sixth form entry pages for neighbouring schools. Full details of AGGS's own entry requirements and application system are on the school's Sixth Form Admissions page.