The ISEB Pre-Tests, often referred to as the ISEB Common Pre-Test, are online entrance assessments used by many leading UK independent schools.

They are commonly taken by pupils in Year 6 as part of the 11+ admissions process, although some schools use them for pupils applying for delayed entry at 13+.

The assessment covers English, Mathematics, Verbal Reasoning and Non-Verbal Reasoning and is designed to give senior schools information about both a pupil’s attainment and academic potential.

For parents, understanding how the ISEB works is useful because it is quite different from a traditional written entrance examination.

By Juliet Rolls, PGCE Cantab, MCCT
Founder of Cambridge Academic Tuition | University of Cambridge-qualified teacher | UK independent school admissions specialist

The ISEB Pre-Tests are a set of four online, adaptive, multiple-choice assessments:

• English
• Mathematics
• Verbal Reasoning
• Non-Verbal Reasoning

They are a shared assessment, which means that a pupil normally sits the tests only once in an academic year and the results can then be shared with the senior schools to which the child is applying.

This avoids children having to sit a separate version of the same assessment for every school.

The tests are used as one part of the admissions process. Depending on the school, pupils may also be required to complete written examinations, interviews or further school-specific assessments.

The standard total testing time is 2 hours and 15 minutes.

The four sections are:

English: 40 minutes

Mathematics: 40 minutes

Non-Verbal Reasoning: 30 minutes

Verbal Reasoning: 25 minutes

The tests do not necessarily have to be completed in one sitting. They can be taken together or divided across separate sessions.

Parents should check the requirements and deadlines of the individual senior schools to which their child is applying.

The ISEB Pre-Tests are adaptive.

This means that the questions presented to a pupil change according to their previous answers.

If a pupil is answering accurately, the test can gradually present more demanding questions. If the pupil is finding questions difficult, the system adjusts accordingly.

As a result, two children sitting the ISEB at the same time may not see exactly the same sequence of questions.

This is one reason why comparing individual questions with friends afterwards is not particularly useful.

No.

Once a pupil has submitted an answer, they cannot return to that question and change it.

This is an important difference between the ISEB and many paper-based examinations.

Students therefore need to develop the habit of:

• reading questions carefully
• checking the available answers
• making a considered decision
• avoiding unnecessary rushing
• moving on confidently once an answer has been submitted

Accuracy and consistency are particularly important.

The English assessment covers Reading Comprehension and Grammar, including spelling.

Students may encounter fiction, non-fiction and poetry.

Skills assessed can include:

• retrieving information
• making inferences
• understanding vocabulary in context
• identifying how writers use language
• recognising grammatical structures
• spelling
• summarising ideas
• comparing information or characters

A strong vocabulary is particularly valuable because it supports not only English but also Verbal Reasoning.

Children preparing for the ISEB should therefore read widely rather than relying entirely on practice questions.

The Mathematics assessment is based broadly on the National Curriculum for Mathematics up to the end of Year 5.

Students need secure mathematical foundations and the ability to apply their knowledge to unfamiliar problems.

Preparation may include:

• number and place value
• the four operations
• fractions
• decimals
• percentages
• measurement
• geometry
• data
• mathematical reasoning
• multi-step problems

Strong ISEB Mathematics performance is not simply about calculating quickly.

Students need to understand what a question is asking, select the correct mathematical method and apply it accurately.

Verbal Reasoning assesses a range of language and reasoning skills.

Questions can involve:

• vocabulary
• word meaning
• relationships between words
• codes
• sequences
• logic
• deduction
• comprehension
• verbal problem solving

Some question types may be unfamiliar to pupils who have not previously studied Verbal Reasoning.

However, vocabulary remains one of the most important underlying skills.

Regular reading, discussion of unfamiliar words and deliberate vocabulary development can therefore make a significant difference.

Non-Verbal Reasoning assesses the ability to recognise and analyse visual patterns and relationships.

Questions may involve:

• shapes
• sequences
• analogies
• rotations
• reflections
• spatial reasoning
• identifying rules and patterns

Rather than memorising dozens of question types, students should learn to approach unfamiliar visual problems methodically.

They should ask themselves what is changing, what remains constant and what relationship connects the shapes or figures.

The English and Mathematics assessments are broadly curriculum-based.

Mathematics is based on content pupils would normally have encountered by the end of Year 5, while English assesses areas including reading comprehension, grammar and spelling.

Verbal Reasoning and Non-Verbal Reasoning have a different purpose. They are designed to assess reasoning, analysis, problem solving and academic potential through question types that may be less familiar.

This means ISEB preparation should combine strong school-based academic foundations with appropriate exposure to reasoning skills.

Children normally sit the ISEB Pre-Tests at an approved invigilation centre.

This is often:

• their current school
• a senior school to which they are applying
• an approved independent testing centre

International students can also sit the assessments overseas at an approved centre.

Parents register their child through the ISEB Guardian Portal and should follow the individual admissions instructions issued by their chosen senior schools.

A pupil should sit the ISEB Pre-Tests only once in an academic year.

Because the ISEB is a shared assessment, the same set of results can be accessed by multiple senior schools.

Parents applying to several schools should therefore ensure that they understand each school’s deadline before arranging the test.

Senior schools receive age-standardised scores.

Age standardisation is designed to make fair comparisons between children of different ages and between pupils who sit the assessment at different points in the academic year.

The average standardised score is 100 within the independent-school applicant standardisation sample.

Schools may also receive additional information such as percentile rankings and stanines.

However, a score should always be interpreted in the context of the individual school and its applicant cohort.

There is no universal ISEB pass mark.

Different schools use the results differently and admissions decisions may take account of:

• ISEB scores
• school reports
• references
• written examinations
• interviews
• other school-specific assessments

Highly selective schools will naturally expect a strong academic profile, but parents should be cautious about claims that a particular score automatically guarantees an interview or offer.

The required level can vary between schools and between applicant cohorts.

For highly selective schools, we generally aim for students to demonstrate strong and consistent performance across all four areas, rather than relying on one particularly high score to compensate for weaknesses elsewhere.

ISEB itself does not normally release Pre-Test results directly to parents.

Results are provided to the senior schools using the assessment as part of their admissions process.

Parents who would like information about their child’s performance can ask the senior school whether it is able to provide the scores or some context about the result.

Good preparation should begin by identifying the child’s underlying strengths and weaknesses.

Simply completing large numbers of mock tests is not always the most effective strategy.

For example:

A child struggling with Verbal Reasoning because of weak vocabulary needs vocabulary development.

A child losing marks in Mathematics because fractions are insecure needs targeted teaching of fractions.

A child performing inconsistently because of rushing needs to develop greater accuracy and discipline.

Practice tests are useful when they help identify these underlying issues.

They are much less useful if children simply complete test after test without analysing their mistakes.

Yes.

Children should be comfortable using a computer and understand how an adaptive multiple-choice test works before sitting the real assessment.

They should know that:

• questions appear individually
• answers are selected on screen
• previous answers cannot be revisited
• different pupils may receive different questions
• the four tests may be taken separately

ISEB provides an official walkthrough so pupils can familiarise themselves with the test environment.

Familiarity with the interface can reduce unnecessary anxiety on the day.

There is no single correct starting point for every child.

In Years 4 and early Year 5, the emphasis should usually be on developing strong foundations in:

• reading
• vocabulary
• comprehension
• arithmetic
• mathematical reasoning
• problem solving

More targeted preparation can then begin once a child’s academic profile, target schools and admissions timetable are clearer.

Some children require relatively little formal preparation. Others may need more time to address gaps in Mathematics, vocabulary or reasoning.

An academic assessment can be useful where parents are uncertain about a child’s current level.

Not every child preparing for the ISEB requires tuition.

A strong student with secure academic foundations may simply need appropriate familiarisation and targeted practice.

Tuition can be particularly useful where:

• there are identifiable gaps in English or Mathematics
• vocabulary needs development
• Verbal or Non-Verbal Reasoning is unfamiliar
• performance is inconsistent
• a student rushes or makes avoidable mistakes
• several highly selective schools are being considered
• parents would like independent assessment and guidance

The important question is not simply whether a child has a tutor, but whether preparation is addressing the right areas.

For many schools, the ISEB is only the first stage of the admissions process.

Students may subsequently be invited to:

• interviews
• written English and Mathematics examinations
• school-specific assessments
• creative writing papers
• scholarship examinations
• further reasoning or problem-solving assessments

Families should therefore avoid treating the ISEB as the entire admissions process.

Preparation should take account of all the requirements of the child’s target schools.

The ISEB is also used for pupils applying to UK independent schools from overseas.

International students may need additional support understanding:

• UK curriculum expectations
• British entrance examination terminology
• Verbal Reasoning
• school admissions timelines
• interview expectations

Because the ISEB can be sat at approved international centres, students do not necessarily need to travel to the UK simply to complete the Pre-Tests.

Cambridge Academic Tuition provides individual ISEB preparation for students applying to selective UK independent schools.

Support can include:

• English
• Mathematics
• Verbal Reasoning
• Non-Verbal Reasoning
• vocabulary development
• reading comprehension
• grammar and spelling
• mathematical problem solving
• examination technique
• adaptive-test familiarisation
• academic assessment
• progress monitoring
• interview preparation
• wider school admissions guidance

Where appropriate, we use academic assessments and practice data to identify a student’s strengths and areas requiring further development.

Preparation is then tailored to the individual child, their target schools and the time available.

Our aim is not simply to teach students how to answer practice questions. We want them to develop the academic knowledge, reasoning ability, accuracy and confidence required to perform independently.

The four assessments take 2 hours and 15 minutes in total.

English and Mathematics are 40 minutes each, Non-Verbal Reasoning is 30 minutes and Verbal Reasoning is 25 minutes.

Yes.

All four assessments use a multiple-choice format.

Yes.

The difficulty and selection of questions changes according to the pupil’s previous responses.

No.

Once an answer has been submitted, the pupil cannot return to that question.

No.

ISEB does not set a universal pass mark. Individual senior schools decide how they use the results as part of their admissions process.

A pupil normally sits the Pre-Tests only once in an academic year. The results can then be shared with multiple senior schools.

No.

The ISEB English assessment is multiple choice and does not include a creative-writing paper. However, individual senior schools may require creative writing at a later stage of their admissions process.

English and Mathematics are broadly curriculum-based. Mathematics draws on National Curriculum content up to the end of Year 5.

Verbal and Non-Verbal Reasoning are designed to assess reasoning and academic potential.

If your child is preparing for the ISEB and you would like a clearer understanding of their current level, an academic assessment can help identify strengths and areas requiring development before deciding how much preparation is needed.

Cambridge Academic Tuition provides ISEB preparation, academic assessment and selective-school admissions guidance for students in the UK and internationally.

Founder at Cambridge Academic Tuition | UK Independent School Entrance Exam Specialist | University of Cambridge Qualified Teacher | International Educational Consultant and Private Tutor for Students aged 3 to 18 years