ISEB Common Pre-Test Explained

The ISEB Common Pre-Test is an online, adaptive entrance exam created by the Independent Schools Examination Board and used by more than 160 independent senior schools across the UK. It tests four subjects: English, maths, verbal reasoning and non-verbal reasoning, and is usually sat once, typically between October and December of Year 6. Rather than sitting a separate exam for every school, one result is simply shared with each participating school on a family's list, which reduces the number of entrance exams a child has to sit overall. 

If you keep hearing about the ISEB Common Pre-Test and wondering exactly what it involves, you are in the right place. Here is a simple guide covering what the test actually is, which schools use it, how it is scored, how it compares to the 11 plus, and how to prepare your child properly. 

What is the ISEB Common Pre-Test?

The ISEB Common Pre-Test is an online entrance exam created by the Independent Schools Examination Board, used by more than 160 independent senior schools across the UK as part of their admissions process. It was designed to give schools a fair, consistent way to assess applicants without every family needing to sit a completely separate test for each school.

One of its most distinctive features is that the test is adaptive. As your child answers questions, the difficulty adjusts in real time based on how they are performing, so a stronger student naturally moves on to more challenging questions, while another child is given questions better matched to their current level. This is designed to give schools a more accurate, fair picture of ability, regardless of whether a child is working above or below the typical level for their age group.

Who takes the ISEB Common Pre-Test, and when?

The ISEB Common Pre-Test is most commonly taken by children in Year 6, applying for Year 7 entry to independent senior schools, though it is also used by some schools for Year 8 or Year 9, or 13 plus, entry points. Most children sit the test once, typically between October and December of Year 6.

The test is designed with the specific age group in mind, with built in accessibility features to ensure a fair experience for every child, including those with special educational needs, and detailed guidance available for families in this situation.

What subjects are in the ISEB Common Pre-Tests?

The ISEB Common Pre-Test covers four key subject areas, each designed to build a broad picture of a child's academic ability and reasoning skills.

English

• Reading comprehension

• Spelling, punctuation and grammar

• Scored separately, not combined into one mark

Maths

• Based on the Year 5 national curriculum

• Ranges from arithmetic to multi-step problems

• Pen and paper allowed for working out, though not marked

Verbal Reasoning

• Word puzzles and hidden word problems

• Logic and pattern based questions

• Vocabulary and comprehension based reasoning

Non-Verbal Reasoning

• Pattern sequences and analogies

• Odd one out and shape based logic

• Spatial awareness questions

Because the maths questions are based on the Year 5 curriculum, many children sitting the test in Year 6 still find this section genuinely challenging, simply because it can cover material from slightly earlier in their schooling that needs a proper refresh.

ISEB Pre-Test format

1. No back button

Once an answer is chosen and your child moves on, it is locked. They cannot return to check at the end the way they are taught to at school. Every answer needs to be checked before clicking Next.

2. No skipping

The Next button only appears once an answer is selected. So there is no leaving a hard question for later. If stuck, your child should rule out the obviously wrong options and make the best choice left.

3. Difficulty moves with your child

Correct answers lead to harder questions, and harder questions count for more. This is why a child can get more questions wrong than a friend and still score higher: they were answering tougher questions.

4. Accuracy beats speed

The test has a set number of questions and ends when they are done. Rushing easy early questions and getting them wrong drags the difficulty down, which caps the score. Careful and steady wins.

5. Helpful screen tools

There is a progress bar showing how far through the test your child is, and a timer in the corner that can be hidden if it causes worry. Font size and a coloured overlay can also be adjusted.

ISEB Common Pre-Test example questions

Here are some questions written in the style of each section, so you can see what your child will face. These are our own examples, not taken from ISEB.

Maths

Topics include number and place value, the four operations, fractions, decimals and percentages, measurement, geometry and statistics. Number questions come up most often.

Example 1. A cinema ticket costs £7.45. How much do 4 tickets cost?

A) £28.80   B) £29.80   C) £29.20   D) £30.80

Example 2. A rectangle is 12 cm long and has a perimeter of 38 cm. What is its width?

A) 26 cm   B) 14 cm   C) 7 cm   D) 3 cm

English comprehension

Children read several short passages, often around 300 to 500 words each, which may be fiction, non-fiction or poetry. Questions test retrieval, inference, vocabulary in context, summarising, literary devices and comparisons.

Example: "The wind howled around the cottage like a hungry wolf." Which technique has the writer used?

A) Alliteration   B) Metaphor   C) Simile   D) Onomatopoeia

English spelling, punctuation and grammar

Question types include filling a gap in a sentence, putting a jumbled sentence in order, and spotting the mistake.

Example: Which part of this sentence contains an error? "The childrens coats / were hung neatly / beside the / front door."

A) The childrens coats   B) were hung neatly   C) beside the   D) front door

It should be children's, with an apostrophe to show the coats belong to the children.

Verbal reasoning

Letter codes, word meanings, hidden words, analogies and logic puzzles.

Example: If CAT is written as DBU, how is DOG written?

A) EOH   B) CNF   C) EPH   D) EPG

Each letter moves one place forward in the alphabet.

Non-verbal reasoning

Children spot patterns, find the odd one out, complete sequences, match codes, work with reflections and rotations, and picture 3D shapes, including counting cubes and matching silhouettes.

Example: A model has a bottom layer of 6 cubes in a 3 by 2 rectangle, with 2 more cubes sitting on top. How many cubes are in the model?

A) 6   B) 7   C) 8   D) 9

In the real test this is a picture, and some cubes are hidden behind others, so children must imagine the ones they cannot see.

For more practice in these formats, our free 11+ practice papers cover English, maths, verbal and non-verbal reasoning, and our 11+ past papers collection gives fuller practice across every section.

How is the ISEB Common Pre-Test scored?

Unlike many exams, the ISEB Common Pre-Test has no fixed national pass mark, since every school sets its own requirements. Instead, your child receives a standardised age score, or SAS, which accounts for their exact age at the time of testing, allowing fair comparison between children born at different points in the school year.

• 100: Represents an average standardised age score

• 120+: Generally seen as a competitive score for stronger schools

• 142: The maximum possible standardised age score

ISEB Common Pre-Test vs the 11 Plus: What is the difference?

Families exploring both grammar school and independent school options often want to know exactly how these two assessments compare, since they can feel quite different in practice.

In practice, many of the underlying skills, strong reasoning, solid maths fundamentals, and confident reading and comprehension, genuinely overlap between the two. This is exactly why families preparing for one often find their child is better placed for the other too, provided preparation covers both the knowledge and the exam technique each format specifically demands.

How to prepare for the ISEB Common Pre-Test

1. Start with genuine reading, not just exercises

Regular, enjoyable reading builds English and verbal reasoning skills naturally, far more effectively than working through worksheets alone.

2. Refresh Year 5 maths topics thoroughly

Since the maths section draws on the Year 5 curriculum, revisiting this material properly, even in Year 6, closes a genuinely common gap.

3. Build comfort with the online, adaptive format

Since the real test is sat entirely on screen, practising with online tools, not only paper based materials, helps your child feel genuinely comfortable on the day.

4. Practise verbal and non-verbal reasoning consistently

These subjects are rarely taught directly in school, so dedicated, regular practice makes a real difference to overall confidence and speed.

5. Start early, but keep it calm

Many families begin preparation in Year 5 or early Year 6, giving plenty of time to build genuine understanding without last minute pressure.

How Pass 11 Plus Grammar helps with ISEB Common Pre-Test preparation

Because the ISEB Common Pre-Test shares so much common ground with the 11 plus, particularly in verbal reasoning, non-verbal reasoning and core maths, our existing preparation programmes give children a genuinely strong foundation for both.

1. Build a proper, structured plan

Our 11 plus tuition programmes cover the exact same core skills the ISEB Common Pre-Test assesses, giving your child a genuinely strong, well rounded foundation across every subject.

2. Get local, experienced guidance

Our 11 plus tutors in Birmingham understand exactly which skills overlap between grammar school and independent school entrance exams, and tailor sessions accordingly.

3. See where your child stands right now

Our free 11+ practice papers are a great, no pressure way to get a feel for verbal and non-verbal reasoning questions early on.

4. Practise with genuine exam style material

Our 11+ past papers give your child real exposure to reasoning and maths questions similar in style and difficulty to what independent school assessments expect.

5. Build up to realistic exam conditions

As test dates approach, our 11 plus mocks recreate genuine timing and pressure, helping your child feel calm and prepared, whatever the exact format on the day.

Our 11 plus intensive summer course packs focused, structured practice into the school holidays, ideal for families wanting a concentrated push before Year 6 begins.

Whether your family is weighing up grammar school, independent school, or both, our team is here to help your child build the genuine confidence and skills these assessments are actually looking for.

Final thoughts

The ISEB Common Pre-Test can feel unfamiliar at first, particularly compared to more traditional paper based exams, but once broken down it is genuinely a fair, well structured way for independent schools to assess ability. With its adaptive format, four core subjects, and standardised scoring, steady, well rounded preparation across reading, maths and reasoning consistently gives children the best chance of putting their true ability on display.

Whatever mix of grammar school and independent school options your family is considering, we would love to help your child prepare with genuine confidence. Get started today!