11 Plus (11+) ISEB Common Pre-Test: The Complete Guide for Parents & Students
18 September 2025 · 20 mins read
Introduction: What is the ISEB 11+ Pre-Test?
The ISEB 11+ Common Pre-Test is a computer-based, multiple-choice assessment used by over 50 leading UK independent schools. Run by the Independent Schools Examinations Board (ISEB), it provides a standardised measure of attainment and potential.
- Who takes it? Pupils in Year 6 (age 10–11), occasionally Year
- - Why? To shortlist applicants for interviews, written exams, or conditional offers.
- When? Once per academic year, between September and June.
- Where? Usually at the pupil’s current prep school or the senior school applied to.
⚠️ Note: The ISEB Pre-Test ≠ Common Entrance (CE). Pre-Test is sat earlier (Year 6/7); CE is later (Year 8, for 13+ entry).
Exam Structure and Subjects
The Pre-Test has four adaptive, multiple-choice modules.
| Subject | Focus Areas | Duration |
|---|---|---|
| English | Comprehension (fiction, non-fiction, poetry), grammar, punctuation, spelling, vocabulary, inference | ~25 mins |
| Mathematics | Arithmetic, fractions, decimals, percentages, ratio, algebra, geometry, data handling, word problems | ~50 mins |
| Verbal Reasoning | Logic, code-breaking, analogies, sequences, word patterns | ~36 mins |
| Non-Verbal Reasoning | Pattern recognition, symmetry, spatial awareness, visual sequences, 2D/3D diagrams | ~32 mins |
- Total duration: ~2 hrs 20–30 mins.
- Adaptive format: Correct answers → harder next questions; mistakes → easier ones.
- One chance only: Pupils cannot revisit answers.
Test Timing & Administration
- English: 25 mins
- Maths: 50 mins
- Verbal Reasoning: 36 mins
- Non-Verbal Reasoning: 32 mins
The modules can be sat all at once or on different days, depending on the school.
The exam system includes:
- On-screen countdown timer.
- Font/colour settings for accessibility.
- Auto-submission when time ends.
Scoring and Standardisation
- Raw scores are converted into a Standardised Age Score (SAS).
- SAS adjusts for the child’s age in months.
- Average SAS:
- - Typical range: 85–
- - 120+: Very strong, top percentile.
📌 Results are sent directly to senior schools. Parents usually do not see them.
Registration Process
- Register through the ISEB Guardian Portal.
- Create/update an Applicant Profile.
- Select schools (results automatically shared).
- Book a test date (Sept–June).
📅 2025–26 cycle: Registration opened 2 September 2025, test window closes late May 2026.
Preparation Strategies
Although ISEB says “no prep required,” experience shows familiarisation improves performance.
Timeline for Preparation
- 6–12 months before: Build subject skills & confidence.
- 3–6 months before: Introduce adaptive mocks & timed drills.
- 1–3 months before: Focus on weak topics & simulate real exams.
Core Habits
- English: Daily reading, comprehension practice, vocab lists.
- Maths: Secure KS2 foundation, tackle worded problems.
- VR: Synonyms, sequences, logic puzzles.
- NVR: Pattern spotting, rotations, visual reasoning drills.
Resources & Practice Materials
Official ISEB
- ISEB Families Hub
- Pre-Tests Admissions Toolkit
- ISEB Prep Pack (65+ practice resources)
- Free Walkthrough Demo
Endorsed & Third-Party
- Bond Online Premium Plus (ISEB endorsed)
- Atom Learning, BOFA adaptive mocks
- CGP & Hachette guides
- PiAcademy question banks
Subject-Specific Preparation Tips
English
- Read widely across fiction/non-fiction.
- Summarise paragraphs in 3–4 lines.
- Revise grammar & SPaG rules.
Mathematics
- Revise fractions, ratios, percentages, algebra.
- Practise multi-step word problems.
- Prioritise accuracy before speed.
Verbal Reasoning
- Synonym/antonym flashcards.
- Code-breaking and sequence puzzles.
Non-Verbal Reasoning
- Symmetry, reflections, 3D rotations.
- Daily puzzles for pattern recognition.
GLECTA Advantage
At GLECTA Tutoring, we prepare children for the ISEB Pre-Test by:
- Running adaptive online mocks mirroring ISEB format.
- Training time management & “1 mark = 1 minute” strategies.
- Providing school-specific prep (St Paul’s, Westminster, Eton, etc.).
- Giving detailed feedback reports to parents after each mock.
- Coaching exam confidence & mindset so pupils enter calm and ready.
👉 Book Mock Exams 👉 Join Our 11+ Courses 👉 Request a Callback
❓ FAQs
Is the ISEB Pre-Test the same as Common Entrance?
No – Pre-Test is taken in Year 6/7, CE in Year 8.
How many times can my child sit the ISEB Pre-Test?
Once per academic year. Results are shared automatically with all schools applied to.
Is there a pass mark?
No set pass mark. Schools set their own cut-offs. SAS 120+ is considered strong.
Do parents see results?
Not usually – scores are sent directly to schools.
Can SEND adjustments be applied?
Yes – apply through ISEB with evidence.
Which schools use the ISEB Pre-Test?
Over 50 UK independents, including Eton, Harrow, Westminster, St Paul’s, Wellington.
How can I prepare my child effectively?
Start 6–12 months early, use adaptive online mocks, revise KS2 topics, and practise comprehension daily.
Is the test harder than GL or CEM?
It is adaptive and computer-based, so the style differs, but content overlaps with GL/CEM reasoning.
When should mocks begin?
From March (bi-weekly), moving to weekly from July before exams.
Can my child practise on paper?
Yes, but they should also do online mocks to mirror the real test environment.
How long is the Pre-Test valid for?
One academic year.
Can children re-sit if they perform poorly?
No – only once per cycle.
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