Year 8 (Age 12–13): ISEB Pre-Test and 13+ Preparation

By Year 8 the ISEB Pre-Test is usually behind you. ISEB designs it for Years 6 and 7, and most senior schools have already decided. What is left is the confirmation stage: Common Entrance or a scholarship exam, sat in Year 8 before entry to Year 9. This page carries the 2026-27 Pre-Test window, the dated 2027 CE and CASE sittings, and what six named schools actually require.

Where does Year 8 actually sit in the 13+ process?

A parent whose child is already in Year 8 has usually arrived here having been told the pre-test is behind them. It is worth being precise about why. ISEB's own Common Pre-Tests Framework states that "The tests are designed for pupils in Years 6 and 7. Some senior schools use the tests for admissions into Year 7, whilst others use it for entry into Year 9." That one sentence sets the boundary of the whole exercise. The Pre-Test is not a Year 8 assessment. A guide that treats it as one is describing a stage most Year 8 families have already walked through, and it is the reason almost every competing page on this subject reads as though it were written for a different child.

What replaces it is the confirmation stage, and ISEB is just as clear about where that sits. Common Entrance at 13+ is described as a "transition assessment available in over eight different subject areas for pupils in Years 7 and 8", and ISEB says those assessments "contain three compulsory papers: English, mathematics and science". Not Year 9. Year 8 — the year before entry. That distinction matters more than it looks. An earlier version of this page said Common Entrance was set by ISEB and taken in Year 9, which moved the entire timetable a year out of position for anyone planning around it. Eton, Harrow and Tonbridge each independently describe their confirming examinations as Year 8 events, which is the check that settles the point.

The second thing to understand is what kind of examination Common Entrance is. ISEB's families page says pupils "are usually entered for CE assessments when they have been offered a place at a senior school that is subject to passing the examinations, which are usually taken in the pupils' current school." In the normal case, then, it is not a competitive shortlisting exam. The competition happened in Year 6. Common Entrance is the senior school checking that the child it chose back in Year 6 has kept working and has been taught the syllabus. That ought to change the shape of preparation completely: steady curriculum coverage across the compulsory subjects, sat in familiar surroundings, rather than the intensive reasoning drilling that suits an entrance exam at eleven.

The complication is that the normal case covers fewer schools than parents expect. Wellington College makes offers in March of Year 6 "conditional only on receiving a favourable report of satisfactory completion of schooling from the current school at the end of Year 8" — no examination at all. Winchester College tells families that boys "will sit Winchester Entrance", but adds that "Entry to Winchester College is not dependent on the results of these examinations." Harrow School, by contrast, states that "All offers are subject to sitting either the Common Entrance (CE) or our Academic Scholarship examinations in Year 8." Three schools, three different answers to the same question. Our Common Entrance and boarding school preparation is built around that variation, because there is no single national Year 8 timetable to build around instead.

What is the 2026-27 ISEB Pre-Test window, and who can still sit it?

The current ISEB session is the 2026-27 one, and its published milestones are unusually specific. ISEB's Common Pre-Tests page lists "Tuesday 9th June 2026: Guardian Portal opens for registration for the 2026-27 session. Do not register before this date" and "Tuesday 1st September 2026: Live testing for the 2026-27 session commences." Testing runs to late May 2027. Those are the operative dates, and they are the reason a Year 8 family reading this in the autumn term is inside a live window rather than outside one — even if, as the next paragraph explains, being inside the window is not the same as being eligible.

One rule governs everything else here. ISEB states that "Pupils can only sit the ISEB Pre-Tests once in any academic year, i.e. between 1 September 2026 and late May 2027." There is no retake, no best-of-two, and no quiet second attempt at a different school's request. The framework goes further and closes the obvious loophole: "In the very unlikely event of a candidate taking the tests more than once within a single academic year, the first set of results will stand." So a child who sat the Pre-Test in Year 7 has spent this academic year's single attempt if that sitting fell inside the same session, and a child who sits it badly prepared has spent it too.

There is one genuine inconsistency in ISEB's own material, and it is worth naming rather than smoothing over. The website gives the live testing window as 1 September 2026 to late May 2027. The 2026-27 Common Pre-Tests Framework PDF says the tests "can be taken between the beginning of October and the end of June, but can only be sat once by a pupil in any academic year." The framework is the older statement of the two and the website carries the session-specific dates, so the website dates are the ones to plan against — but if a prep school quotes you an October-to-June window, that is where it comes from, and it is not wrong so much as out of date.

Nothing in any of this says a school will accept a Year 8 sitting. The window is ISEB's; the deadline that binds your child is the senior school's, and those are set individually. Harrow, for instance, asks that "All standard applicants should sit the ISEB CPT between 1 October and the end of November in Year 6" — a fixed two-month slot inside a much wider national window.

What is actually in the Pre-Test, and why does the Year 5 maths ceiling matter?

This is where the previous version of this page did the most damage, so it is worth correcting in detail. It claimed the Pre-Test mathematics "draws on topics up to approximately Year 8 of the national curriculum — including algebra, fractions, ratio, geometry, and data handling", and recommended weeks of algebra revision on that basis. ISEB's framework says the opposite: "Questions will assess a pupil's knowledge of mathematics topics from the National Curriculum Programme of Study up until the end of Year 5". ISEB repeats the cap for its own endorsed practice platform — "Mathematics: questions are based on the National Curriculum for Mathematics until the end of Year 5." Two separate ISEB documents, the same ceiling.

That is not a small correction, because it inverts the preparation advice. A Year 7 or Year 8 pupil sitting this paper is being tested on material capped several year groups below their current teaching. The risk for an older, well-taught candidate is not that the content is hard; it is speed, accuracy and carelessness on arithmetic they have not consciously practised since primary school. Time spent on algebra and ratio because a guide said the paper reaches Year 8 is time taken from the fluency work that actually moves the score. If you want that fluency built alongside school work, it belongs in ordinary subject tuition, not in a crash course.

The English side is more modest than it is usually described too. ISEB's framework says pupils "will be presented with several short passages (between 300 – 500 words) each with a series of multiple-choice questions." Short passages, multiple choice. An earlier claim on this page that the English sits at a level "broadly consistent with the end of Key Stage 3" has no source behind it and has been removed. What does help is volume of reading and the habit of answering from the text rather than from memory — which is exactly the skill the reading comprehension format rewards.

Results are reported as "A Standardised Age Score (SAS) which is based on the accuracy of the pupils' answers and their consistency", alongside a stanine, a percentile rank and a group rank. The comparison group is not the national population: ISEB says results are "standardised against a sample of pupils applying for independent school admission, giving consistency across each cohort of pupils." That is a demanding reference group, and it is the reason a score that looks unremarkable can still be strong. ISEB publishes no threshold, no target band and no count of the schools that use the test, so any page telling you what score is competitive is telling you something no exam board has said.

The timings are worth doing the arithmetic on. ISEB tells families the four tests "will take 2 hours 15 minutes to complete" — 135 minutes across four tests, an average of 33.75 minutes each. Harrow tells parents something different: "It takes approximately two and a half hours to complete and its components can be taken together or at separate times", and Eton says much the same. Two and a half hours is 150 minutes, so the schools are asking families to allow 15 minutes more than the board's figure. Plan the day around the schools' number. For a candidate granted the SEND arrangement — ISEB states that "applicants with SEND can be given additional time of 25% to complete each test element" — 25% on top of 135 minutes is 33.75 extra minutes, taking the full battery to 168.75 minutes of testing, which is a genuinely long morning for a child of that age.

When is Common Entrance at 13+ in 2027, and what are the papers?

Common Entrance at 13+ is the exam most Year 8 families are actually preparing for, and the single most useful thing to know about it is that there is more than one sitting. ISEB states plainly that "There are three CE at 13+ examination sessions each year, in November, January and May/June." Almost every guide on this subject describes a single June exam. Three sessions changes the planning: a school may enter a candidate at a point that suits its own timetable, and a family arriving late in Year 8 is not automatically looking at next summer.

A note on the table above, because it matters more than a tidy row would. ISEB's published CE at 13+ timetable gave day-level windows for the spring and summer 2027 sittings only. The autumn session exists — ISEB names November as one of the three — but no day-level window is printed for it here, because the timetable extract read did not carry one. An invented date on a page like this is worse than a blank, and a blank tells you exactly what to go and confirm with the school.

The paper structure repays a close look, because the compulsory core is bigger than the phrase "three papers" suggests. English is split in two: ISEB's timetable lists "English Foundation or Core Reading (1 hour 10 minutes)" and "English Writing (1 hour 15 minutes)" — 70 minutes plus 75 minutes, or 145 minutes of English, which is 2 hours 25 minutes. Science Core is three separate short papers rather than one long one: "Science Core Biology (40 minutes) Science Core Chemistry (40 minutes) Science Core Physics (40 minutes)", so 3 x 40 = 120 minutes, two full hours of science. Mathematics carries a separately timed "Mathematics Mental Arithmetic Test (10 minutes)" on top of its written work.

The mathematics written papers are left blank in the table on purpose. The timetable extract checked carries the mental arithmetic timing but not the written paper durations, so there is nothing honest to put there. Ask the prep school, or the entering senior school, which papers and which tier your child is down for — Foundation or Core changes the reading paper, and the optional subjects beyond the compulsory three vary by candidate. If languages or sciences are the weak link, that is a case for targeted subject support rather than general revision.

Is CASE worth attempting, and can it replace Common Entrance?

The scholarship route runs on its own calendar, and for a Year 8 family it is the calendar that bites first. ISEB states that "There are two CASE sessions each year, in February and May" — both of them before the summer Common Entrance written papers in June. A child aiming at an academic award is therefore working to a deadline months earlier than the one their classmates are working to, on top of the same syllabus.

CASE also works differently from Common Entrance administratively. ISEB says that "Pupils sitting CASE assessments are entered by the senior schools they have applied to, who choose which papers pupils will sit and also mark the papers." The family does not pick the papers and the prep school does not mark them. More importantly, a CASE result can remove the next exam entirely: ISEB asks senior schools to report results to prep schools quickly "so that decisions can be made about whether a candidate still needs to be entered for the CE examinations." A strong February result can end the Year 8 examination season in February.

Individual schools layer their own scholarship rounds on top. Harrow says an applicant "will usually sit the first round of Academic Scholarship examinations in January of Year 8 at his own school and the second round at Harrow in late February." Tonbridge splits it by discipline: "Non-core Scholarships assessment (art, drama, DTE, music and sport) take place in January of Year 8, with Academic Scholarship exams taking place early in the Summer Term of Year 8." So at one school the academic award is decided by late February and at another it is decided in the summer term, from what was the same starting position.

On paper lengths, ISEB's CASE timetable gives Mathematics as 1 hour 30 minutes, timed 10.00 to 11.30. No durations are published here for the CASE English paper or the other CASE subjects, because the extract read did not carry them, and a scholarship paper is precisely the wrong place to guess. The general point stands without the missing numbers: CASE papers are set to stretch candidates further than the equivalent Common Entrance papers, and a child entered for both is preparing for two different levels of demand in the same subjects.

Which schools decide in Year 6, and which confirm in Year 8?

This is the question a Year 8 parent is actually asking, and no competitor page on this search answers it: which schools have already decided, and which are still deciding? The table below sets six schools side by side using only what each publishes on its own admissions pages. Blank cells are deliberate — they mark a detail the school's public page did not give, not a detail that could be estimated.

Read down the last column and the pattern is that there is no pattern. Eton confirms its Conditional Place "by passing King's Scholarship, Common Entrance or Eton Entrance examinations at age 12/13 in UK School Year 8". Harrow makes every offer subject to a Year 8 exam and sets a floor for candidates who are not at CE-preparing schools: such an applicant "will be expected to sit CE examinations in three subjects in June of Year 8 as a minimum". Wellington needs a report and nothing else. Winchester sits an examination that does not decide anything. One correction belongs here explicitly: an earlier version of this page listed Winchester among the schools using the ISEB Pre-Test. It does not use it. Winchester's published assessment page says "General Ability Testing (GAT) is an online test administered virtually by Winchester College staff." If your shortlist includes Winchester, the ISEB Pre-Test is not the test you are preparing for.

The registration column is the one that catches families out, because two of these deadlines fall before the year most parents start thinking about senior schools at all. Radley states that "Our entry assessment starts in Year 6, so we encourage applicants to register with us by the start of the Summer Term of Year 5", and Eton's registrations "will close on 31 August (previously 30 June deadline)" at the end of Year 5. If you are reading this with a Year 8 child, those doors are shut; if you are reading it with a younger sibling in mind, they are the two dates to write down now. Broader guidance on the wider assessment landscape sits on our admissions tests page.

What if your child is in Year 8 and has never sat a Pre-Test?

This is the honest version of the question behind most searches that land here. A child is in Year 8, the family has decided on independent senior school entry later than most, and nobody has sat a Pre-Test. What happens?

Start from what ISEB says rather than from what agencies say. The tests are "designed for pupils in Years 6 and 7". That is a design statement, not a rule about who may register, but it tells you the norming and the content were built for younger candidates — and the Year 5 mathematics ceiling is consistent with that. An earlier version of this page asserted that some schools accept Pre-Test registrations from Year 8 pupils. That claim had no source behind it and has been removed. What is verifiable is narrower and more useful: registration runs through the Guardian Portal, the sitting is once per academic year, and the deadline that binds you is set by the senior school, not by ISEB.

So the productive move is not to hunt for a Pre-Test slot. It is to find the schools whose route does not run through the Pre-Test, or whose route has a later gate. Wellington is explicit that children "sit the ISEB Common Pre-Test in either Year 6 or 7" — one of the few schools to name Year 7 in writing. Winchester does not use the ISEB Pre-Test at all; it uses its own General Ability Testing. Radley's entry assessment starts in Year 6. Tonbridge gives provisional-offer boys a further gate in the Spring Term of Year 7. Every one of those is a different shape of opportunity for a family arriving late, and which one applies depends entirely on the shortlist.

The second productive move is to ask each school directly, in writing, two questions: whether it will consider an application at this stage at all, and what assessment it would use instead. Schools answer that question; the internet mostly does not. Nothing on any tuition website, this one included, can override an individual admissions office's answer, and a page that implies otherwise is selling a certainty it does not have.

How should you plan the Year 8 year?

Planning the Year 8 year is mostly a matter of finding out which of a few possible futures you are in, and then working backwards from a real date. If the offer is already held and confirmation is by Common Entrance, the exam is very likely to be sat in the child's own prep school, in one of the three sessions ISEB runs, on the compulsory core of English, mathematics and science plus whatever optional papers the school enters. That is a syllabus problem, and a syllabus problem responds to consistent term-time work rather than to a sprint.

If a scholarship is in play, the timetable compresses hard. The February CASE window, and Harrow-style rounds in January and late February, mean the peak of preparation falls in the middle of the Year 8 spring term rather than in the summer. Families often discover this in December, which is late. The compensating fact is the one ISEB names: a good CASE result may mean no Common Entrance entry at all, so the compressed effort can shorten the year rather than lengthen it.

If the destination school requires no examination, resist the urge to invent one. Wellington's condition is a favourable end-of-Year-8 report, and the way to secure that is ordinary good standing at school. In that case the sensible use of Year 8 is to look further ahead: the transition into Year 9 sets the trajectory into GCSE study, and a child arriving with soft foundations in mathematics or languages tends to meet the consequences later rather than immediately.

Whichever of those you are in, the first task is the same and it is not academic. Get the school's own published requirement in front of you, in writing, for every school on the list. This page carries dated windows and paper structures precisely so that conversation starts from facts rather than from a generic timetable, and every figure on it was taken from ISEB or from a named school's admissions page and checked on 23 August 2026.

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