How to prepare for the Harrow School 11+ exam

The exam at a glance

Harrow School is academically selective and admits boys at Year 9, so families aiming for a September 2028 start are preparing during Year 6 in autumn 2027. For 2028 entry, the first stage is the ISEB Common Pre-Test. ElevenReady’s verified information confirms that this is an online, computer-based test covering Maths, English, Verbal Reasoning and Non-Verbal Reasoning.

The ISEB Common Pre-Test is adaptive, which means the level of challenge adjusts as a child answers. It is also tightly timed, so children need more than subject knowledge: they need to work calmly, read carefully on screen and keep moving. In practice, that means preparation should include both accuracy and pace.

Harrow’s admissions process does not end with the ISEB test. The school’s Year 9 entry information explains that there is a second stage, the Harrow Test, taken later in the process by candidates who are invited to continue. Parents should therefore think of the autumn ISEB test as the first hurdle rather than the whole admissions journey.

What does the day look like? The school states that boys should sit the ISEB Common Pre-Test during the autumn window in Year 6, usually at their current prep or junior school if that school is registered as a test centre, or otherwise at an authorised centre. Because the test is delivered on computer, it helps if children are used to reading instructions on screen, selecting answers confidently and moving between short, timed sections without becoming flustered.

Board: ISEB Common Pre-Test
Format: online adaptive test
Subjects: Maths, English, Verbal Reasoning, Non-Verbal Reasoning
Delivery: computer-based
Next stage after pre-test: Harrow Test for shortlisted candidates

If you want a quick overview of Harrow’s admissions route and current key-date summary, see The Harrow School 11+ guide (format, catchment, dates).

Registration and key dates

Harrow runs its own admissions process for Year 9 entry through the school’s admissions system. The official Year 9 entry page explains that parents must register a boy with Harrow, and the school’s key dates page then sets out the deadlines for standard and late applicants.

For the current published cycle on Harrow’s website, standard applicants register by 30 September 2026. The same key dates page says the ISEB Common Pre-Test must be taken before 30 November 2026 for that cycle, and that the Harrow Test takes place from January to March 2027. Because families reading this guide are aiming for 2028 entry, those exact dates are not yet the 2028 cycle; however, they are the most useful official indication of the school’s typical timetable.

The Year 9 entry page gives the clearest pattern for future planning: standard applicants should sit the ISEB Common Pre-Test between 1 October and the end of November in Year 6. It also says late applicants should sit the pre-test as soon as possible after registration, and in the current admissions information late applicants are told to complete the process promptly because they are competing for fewer places.

In practical terms, families targeting September 2028 should expect registration and testing to fall broadly along this pattern unless Harrow publishes a revised calendar:

Registration: by the end of September in Year 6 for standard applicants, based on Harrow’s current key dates
ISEB Common Pre-Test: typically from early October to late November in Year 6
Second-stage Harrow Test: typically in the following January to March for candidates invited forward

Harrow’s fees page for admissions states a registration fee of £450 inclusive of VAT. Check the school’s own admissions page before applying, as fees and deadlines can change.

The school’s admissions pages do not, in the sources reviewed, set out a full public checklist of documents on one page. In most cases, parents should be ready to complete the school’s registration form and follow the instructions given in the applicant portal or by admissions. If you are applying under any family connection category, make sure you read Harrow’s guidance carefully and have any supporting evidence ready.

To avoid missing changes, parents can use Free email alerts for this school's key dates.

Who can apply: catchment and admissions

Harrow School is an independent boarding school and there is no catchment area. Admission is not based on distance from the school in the way many state grammar schools operate. Instead, places are awarded through the school’s own selective admissions process.

ElevenReady’s verified school data records 160 Year 7 places for this guide’s planning purposes. Harrow’s own admissions materials for Year 9 entry make clear that the process is competitive and that late applicants compete for fewer places. That is one of the strongest reasons to register on time if you are seriously considering the school.

Harrow also states that families with qualifying and verified Old Harrovian connections may be entitled to particular benefits or discounts. Because these arrangements can depend on the exact relationship and the evidence required, families should read the school’s latest admissions and fees information closely and, if necessary, contact admissions directly for clarification.

What matters most for most applicants is this:

there is no local catchment advantage
the process is selective and staged
meeting the school’s deadline matters, because late application reduces the number of places available
registration does not itself guarantee a later offer

Harrow’s website does not publish a pass mark or a public score threshold for the ISEB Common Pre-Test in the sources reviewed. Parents should assume that there is no published cut-off score and should rely on the school’s admissions pages rather than informal online claims.

A month-by-month preparation plan

Because the pre-test is taken in the autumn of Year 6, the most sensible approach is steady preparation through Year 5 and the summer before Year 6. For most children, consistency matters far more than very long sessions. A realistic plan is usually better than an intense one that becomes stressful.

January to March in Year 5

Aim for 1.5 to 2 hours a week in total, split across short sessions.
Build secure core maths: arithmetic fluency, fractions, place value, worded problems and mental methods.
Strengthen English basics: vocabulary, precise reading, spelling patterns and grammar awareness.
Introduce light verbal and non-verbal reasoning so the format feels familiar rather than strange later on.
Use screen-based practice sometimes, because the real test is computer-based.

April to June in Year 5

Increase gently to around 2 to 3 hours a week.
Start mixing subjects within one sitting so your child practises switching focus.
Work on speed in easy questions before speed in hard ones: quick wins are valuable in an adaptive test.
Keep reading every day. Strong vocabulary and careful comprehension support English and verbal reasoning.
After each practice set, review errors calmly. Ask: was it knowledge, attention, timing or nerves?

July to August before Year 6

Keep momentum without turning summer into a grind: around 2 to 4 hours a week is plenty for many children.
Introduce short timed sections on screen.
Practise working under mild time pressure, then recovering quickly after a difficult question.
Do not overdo full tests. At this stage, targeted work usually gives a better return than repeated mock scores.
If your child is sitting for several independent schools, make a simple calendar so deadlines and formats do not become confused.

September in Year 6

Move to 3 to 4 hours a week, still spread across several sessions.
Complete regular mixed practice in all four subjects.
Start doing more realistic timed work.
If registration is still open for your cycle, check the school’s deadline immediately and complete it in good time.
Make sure your child knows how adaptive tests feel: some questions will become harder, and that is normal.

October to November in Year 6

This is usually the main ISEB testing window for standard applicants, based on Harrow’s published pattern.
In the final weeks, focus on rhythm and confidence rather than cramming new topics.
Use one or two well-chosen full practice experiences, then review thoroughly.
Reduce workload slightly in the last few days so your child goes in fresh.

After the pre-test

Do not stop completely if Harrow remains a serious option.
If invited to the next stage, your child may need to prepare for the Harrow Test in the following term.
Keep academic work steady, especially reading, writing and problem solving.

The key is balance: enough preparation to build familiarity and speed, but not so much that every session feels high stakes.

Subject by subject: what to practise

Maths

For the ISEB Common Pre-Test, maths preparation should focus on secure Key Stage 2 content and efficient problem solving. Children need fluent number skills, confidence with fractions, decimals and percentages, and the ability to interpret short word problems quickly. Because the test is adaptive and timed, they should practise spotting the method fast rather than writing out long workings. Useful habits include estimating before answering, checking whether an answer is sensible and moving on promptly if stuck.

Good practice includes short mixed sets, mental arithmetic, multi-step word problems and regular screen-based questions. If a child is accurate but slow, trim the length of working. If quick but careless, build a habit of checking key numbers before clicking an answer.

English

English in the pre-test typically draws on reading and language skills rather than extended creative writing. Children benefit from strong vocabulary, precise comprehension, grammar awareness and the ability to infer meaning from a short passage. Encourage reading that stretches language a little beyond comfort level: classic children’s fiction, quality non-fiction and well-written magazine articles can all help.

Practise short comprehension tasks, vocabulary-in-context work, synonyms and antonyms, punctuation, sentence structure and cloze-style activities. On screen, children need to read carefully without losing pace, so shorter but regular digital practice is useful.

Verbal Reasoning

Verbal reasoning rewards flexible thinking with words, letter patterns and logical relationships. Depending on the digital format used by ISEB, children may meet tasks involving vocabulary, codes, sequences, analogies or structured logic with words and letters. The exact mix can vary, so the best preparation is broad familiarity rather than drilling one narrow type.

Build vocabulary steadily, because strong word knowledge often helps more than families expect. Then practise pattern recognition, letter movement, alphabetical order, word relationships and quick elimination of implausible answers. Timing matters here: children should learn to keep momentum rather than wrestling too long with one awkward item.

Non-Verbal Reasoning

Non-verbal reasoning tests how confidently a child can recognise visual patterns and changes in shape, position, rotation, reflection and sequence. Children often improve quickly once they learn to look systematically. Encourage them to ask: what is changing each time, and what is staying the same?

Practise series, matrices, odd-one-out patterns, rotations, reflections and shape codes. Keep sessions short and focused. If your child tends to guess visually without checking, teach a simple routine: inspect direction, number, size, shading and position before choosing. Because the real test is on screen, at least some practice should also be on screen.

Practice papers and mock exams

Practice papers are most useful when they are used as a learning tool, not just as a score generator. For an adaptive online test, children need a mixture of three things: secure knowledge, familiarity with question styles and confidence working under time pressure.

A sensible approach is:

start untimed, so your child learns the method properly
move to short timed sets by subject
build up to mixed sessions across all four subjects
use occasional full mock-style practice to rehearse stamina and concentration
review mistakes in detail, especially avoidable ones

When reviewing, sort errors into simple categories: didn’t know it, misread it, ran out of time or changed a right answer. That tells you what to fix next. It is much more useful than simply noting a percentage score.

For free school-specific practice, use Free Harrow School practice papers (one per tested subject, with answers). These are a good way to build familiarity across Maths, English, Verbal Reasoning and Non-Verbal Reasoning.

You may also find it helpful to keep the main school page bookmarked: The Harrow School 11+ guide (format, catchment, dates). For updates, use Free email alerts for this school's key dates.

If you use mock exams from any provider, choose them carefully. The best mocks are those that reflect the online, timed nature of the ISEB Common Pre-Test and provide useful feedback afterwards. One high-quality mock with proper review is worth far more than several rushed tests taken back to back.

On the day

For a computer-based selective test, calm routine matters. Children usually perform best when the day feels organised and familiar rather than overimportant.

Make sure your child knows where they are sitting the test and what the arrival arrangements are.
Keep the previous evening quiet. Do not introduce new topics at the last minute.
Aim for a normal breakfast and good hydration, without making a fuss about it.
Remind your child that the ISEB pre-test is adaptive, so some questions will feel harder. That is expected and not a sign they are doing badly.
Encourage simple test habits: read carefully, answer decisively, do not panic over one difficult item and reset mentally after each question.
If your child finishes a section feeling uncertain, reassure them that one section rarely tells the whole story.

The most helpful message is usually: work steadily, keep moving and do the question in front of you. Children do not need a motivational speech at the door; they need a calm adult who believes they are ready.

After the exam: results, allocation and appeals

After the ISEB Common Pre-Test, Harrow considers candidates for the next stage of its admissions process. The school’s published information for the current cycle shows that boys who progress may then sit the Harrow Test between January and March. In other words, the pre-test is used as part of a staged selection process rather than as the sole decision point.

Harrow’s admissions pages do not, in the sources reviewed, publish a public pass mark, a standardised score threshold or a ranked cut-off for the ISEB Common Pre-Test. Parents should therefore be cautious about unofficial online claims about “safe” scores.

Because Harrow is an independent school, its offer process is different from state-school National Offer Day arrangements. Decisions, waiting-list movement and any appeal or review route are handled under the school’s own admissions procedures. If your child is not offered a place or does not progress, the right next step is to read Harrow’s admissions correspondence carefully and ask the admissions office about any formal review or appeal process available in that cycle.

If your child does progress, keep preparation steady and age-appropriate for the next stage. A child who has done well in the ISEB test will still benefit from calm, structured preparation rather than pressure.

What has changed recently

In the official sources reviewed for this guide, Harrow’s admissions information for the current cycle sets out a clear two-stage process using the ISEB Common Pre-Test in the autumn of Year 6 followed by the Harrow Test from January to March. The key dates page also distinguishes between standard and late applicants and makes clear that late applicants should complete testing as soon as possible and are competing for fewer places.

No other clearly announced recent change to board, format, catchment or place numbers was identified in the official sources reviewed. If Harrow publishes updated dates or process changes for 2028 entry, parents should treat the school’s own admissions pages as the primary source.

Frequently asked questions

Does Harrow School have an 11+ exam?

Harrow admits boys for Year 9 entry, not Year 7. For families planning ahead, the first stage for 2028 entry is the ISEB Common Pre-Test taken in Year 6.

What subjects are in the Harrow entrance pre-test?

For 2028 entry, ElevenReady’s verified information confirms Maths, English, Verbal Reasoning and Non-Verbal Reasoning.

Is the Harrow pre-test on paper or on computer?

It is computer-based. Because it is also adaptive and timed, screen practice is important.

When should my child sit the ISEB Common Pre-Test for Harrow?

Harrow’s Year 9 entry page says standard applicants should sit it between 1 October and the end of November in Year 6. Always check the school’s latest key dates for your exact cycle.

Does Harrow publish a pass mark for the ISEB Common Pre-Test?

Not in the official sources reviewed for this guide. Parents should be wary of unofficial score claims online and rely on Harrow’s admissions pages.

Is there a catchment area for Harrow School?

No. Harrow is an independent boarding school and does not use a state-style catchment area.

What happens after the pre-test?

Candidates who are invited to continue go on to the Harrow Test, which the school’s current key dates page places between January and March in the next stage of the process.

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Sources

Harrow School – Year 9 Entry: Harrow admits at Year 9; uses a staged admissions process; standard applicants should sit the ISEB Common Pre-Test between 1 October and the end of November in Year 6; late applicants should sit the ISEB Common Pre-Test as soon as possible after registration; late applicants compete for fewer places
Harrow School – Key Dates: For the current published cycle, standard applicants register by 30 September 2026; ISEB Common Pre-Test prior to 30 November 2026; Harrow Test January to March 2027; late applicants should complete the process promptly.
ISEB – Common Pre-Test: The Common Pre-Test is an online, adaptive assessment used by independent schools; it is computer-based and covers English, mathematics, verbal reasoning and non-verbal reasoning.

Preparing for other schools in Harrow

Written by ElevenReady from the school's published information and reviewed by a person before publishing. Last reviewed 4 October 2026. Exam arrangements change. Check the school's admissions page for the current year.