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A-level Chemistry practical endorsement: what it means for you

Understand how the endorsement works in England, what CPAC evidence involves, how exam boards organise practical work and how practical skills are tested in written papers.

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Current answer

What is the A-level Chemistry practical endorsement?

In England, the A-level Chemistry practical endorsement is a compulsory, teacher-assessed part of the course—not one final practical exam.

  • You complete a programme containing at least 12 suitable practical activities, covering the required apparatus, techniques and skills.
  • Your teacher decides whether the evidence shows that you meet all five Common Practical Assessment Criteria (CPAC) consistently.
  • The outcome is Pass or Not Classified (NC) and is reported separately from your written A-level grade.
  • Practical knowledge still earns marks in the written papers through questions on methods, data, uncertainty, errors and evaluation.

A Pass adds no marks to the examination grade, and NC does not itself remove that grade. However, a university or course may require a Pass separately. Ofqual’s science conditions set out the regulatory separation between the two results.

Practical experience, CPAC and written-paper marks are different

Practical learning contributes in three related but separately recorded ways.

Part of the courseWhat it showsHow it is recorded
Practical experienceYou have undertaken a suitable breadth of laboratory work and used the prescribed apparatus and techniques.Activity records and contemporaneous laboratory records.
Direct practical competencyYou can carry out and document practical work against the five CPAC areas.A separate Pass or Not Classified endorsement.
Indirect practical assessmentYou can reason about methods, data, errors, uncertainty and evaluation.Marks in the written A-level papers.

Key distinction: practical experience supports both the endorsement and written-paper performance, but the endorsement result itself contributes no marks to the examination grade.

The five CPAC areas

CPAC is the common framework used by English exam boards to judge practical competence. The summaries below are student-friendly; the full wording appears in Ofqual’s science conditions.

“consistently and routinely meet the criteria” — Ofqual

That wording matters: attendance or one successful experiment is not enough on its own.

A Pass requires evidence across all five CPAC areas, gathered through repeated practical performance.

CPAC areaWhat it means in practicePossible evidence

Following procedures

Follow written procedures appropriately and respond sensibly to the practical task.

The teacher observes you following the method accurately and working with suitable independence.

Investigative approaches

Select and apply suitable methods, instruments and equipment.

You make or justify choices rather than relying on excessive step-by-step support.

Safe working

Use practical equipment and materials safely.

The teacher observes safe setup, handling and working practices.

Observations and records

Make and record measurements and observations appropriately.

Your notes, tables, graphs and calculations are clear, timely and usable.

Research and reporting

Research, reference and communicate scientific information appropriately.

Your practical records, conclusions and reporting show appropriate scientific communication.

What evidence can support a practical endorsement Pass?

Teachers build an evidence-based judgement across the course. A contemporaneous record is made during or around the practical work, rather than reconstructed much later. There is no single nationally prescribed laboratory-book format.

  • Direct teacher observation

    How you follow procedures, handle apparatus, work safely and respond to the practical task.

  • Your practical records

    Measurements, observations, tables, graphs, calculations, conclusions and other records made around the activity.

  • Coverage tracking

    Centre records showing which activities, apparatus, techniques and CPAC areas you have demonstrated.

  • Your individual contribution

    Where work is shared, the teacher still needs evidence of what you personally did and understood.

  • Repeated performance

    Evidence across the programme, rather than one isolated success or one completed worksheet.

  • Evidence in context

    A complete results table may show recording skill, but it does not by itself prove safe handling, investigative judgement or independent equipment use.

AQA, OCR and Pearson Edexcel organise practical work differently

All three boards must meet the same English regulatory minimum, but they package practical experience differently.

Awarding organisationPractical programmeImportant distinction
AQA12 named required practical activitiesAQA says they “must be carried out by all students taking this course”. See AQA practical assessment.
OCRPractical Activity Groups (PAGs)Centres may use, adapt or replace suggested activities when the programme still covers the mapped CPAC, apparatus and techniques. See OCR guidance.
Pearson Edexcel16 identified core practicalsThe specification identifies 16 core practicals while the endorsement retains the regulatory minimum of at least 12 suitable activities. See the Pearson Edexcel specification.

Therefore, the phrase “12 required Chemistry practicals” describes AQA accurately but is not a universal cross-board description.

One titration, three kinds of assessment

A single activity can support several different outcomes. This example is conceptual, not a set of laboratory instructions. Written questions may also test method design, variables, apparatus choice, data processing, graphs, precision, uncertainty, error, evaluation and unfamiliar contexts.

Doing the practical, demonstrating competency and earning written-paper marks are related but separately assessed.

Assessment layerTitration exampleHow it is assessed or recorded

Practical experience

You prepare a solution and carry out a titration as part of the taught practical programme.

Activity and laboratory records showing the experience and techniques covered.

Direct competency

The teacher observes safe and appropriate burette and pipette use, measurement and recording.

Evidence towards the CPAC judgement and the separate endorsement result.

Written assessment

A paper asks for a concentration calculation, an uncertainty, a reason for rinsing apparatus or an evaluation of the method.

Marks in the written A-level papers.

What to do if you miss practical work or move centre

Missing one practical does not automatically mean Not Classified. What matters is your board’s programme, coverage of the required apparatus and techniques, and whether the centre has enough evidence across every CPAC area. A replacement opportunity may still be needed.

  • Identify the gap

    Ask which activity, apparatus or techniques you missed.

  • Ask what evidence already exists

    Find out whether your teacher already has evidence of the relevant CPAC skills from other practical work.

  • Confirm whether another session is needed

    Ask whether you need an alternative practical opportunity and when it must be completed.

  • Keep your record current

    Check that your laboratory book or practical portfolio is complete and up to date.

  • Request records before moving centre

    Ask for your laboratory book or portfolio, completed-activity list, apparatus and techniques record, CPAC progress and previous board details.

  • Give the new centre time to review the evidence

    The receiving centre remains responsible for the final judgement and may need to observe further practical work.

Message an exam centre before you book

Private candidates: confirm the practical provision before you book

When this applies

You are entering A-level Chemistry outside a school or college and need to confirm that the centre can provide and assess the practical endorsement.

Suggested wording

I am planning to enter A-level Chemistry as a private candidate. Can your centre provide and assess the full practical endorsement for my exam board, and what evidence, sessions, dates and fees would apply?

Why this helps

Booking the written papers alone does not normally provide the practical endorsement. Before paying, confirm that the entering centre will provide the practical programme, supervise and authenticate your work, assess CPAC and administer the full qualification entry.

It asks about the complete practical provision before you pay for a written-paper entry or commit to a study option.

Resits, access arrangements and university requirements

These situations have clear general principles, but the final outcome can depend on current board, centre or admissions rules.

Recommendation

Resitting the written papers

A previous practical-endorsement Pass can usually be carried forward when the written A-level is resat, including between JCQ awarding organisations.

What to do: Tell the entering centre about the previous result before it makes any new practical entry.

Check first

The centre must follow the current board’s entry arrangements; do not rely on an old entry code or assume a new practical entry is needed.

Read OCR’s current guidance

Recommendation

Reasonable adjustments or an exemption

Adjustments may improve access where they do not replace the competency being assessed. JCQ says the relevant skill “must be demonstrated by the candidate”.

What to do: Discuss your normal way of working with the centre’s SENCo and Chemistry staff early.

Check first

An exemption must be requested and approved; it is not automatic for a diagnosis.

Read the JCQ guidance

Recommendation

AS Chemistry

The separately reported endorsement belongs to the full reformed A-level, not the AS qualification.

What to do: Use your board’s current AS specification for its practical teaching and written-assessment requirements.

Check first

AS Chemistry can still include practical work and written questions about practical skills.

Read the science subject content

Recommendation

University entry

Some courses require or expect a practical-endorsement Pass as a separate condition when a science A-level forms part of an offer. Current examples include UCL’s general undergraduate requirements and Chemistry at Oxford and Imperial.

What to do: Read the current admissions page for the exact university, course, applicant circumstances and entry year.

Check first

Do not infer one Chemistry, medicine or STEM course’s position from another; requirements can change.

Official sources and further reading

These are the regulator, subject-content, exam-board, qualification and admissions pages used for this guide. Assessment rules and entry requirements can change, so the access date is shown.

  • Ofqual — science subject-level conditions

    Official regulator · May 2016 · accessed 4 August 2026

    Open source 1

  • Department for Education — science subject content

    Official subject content · April 2014 · accessed 4 August 2026

    Open source 2

  • AQA — A-level Chemistry practical assessment

    Official exam-board guidance · accessed 4 August 2026

    Open source 3

  • OCR — planning the practical programme

    Official exam-board guidance · updated 26 January 2026 · accessed 4 August 2026

    Open source 4

  • OCR — non-completion, private candidates and resits

    Official exam-board guidance · updated 11 November 2025 · accessed 4 August 2026

    Open source 5

  • Pearson Edexcel — A-level Chemistry specification

    Official specification · Issue 3, February 2024 · accessed 4 August 2026

    Open source 6

  • AQA — private candidates and non-exam assessment

    Official exam-board guidance · accessed 4 August 2026

    Open source 7

  • AQA — carry forward of marks

    Official exam-board guidance · accessed 4 August 2026

    Open source 8

  • JCQ — non-examination assessment instructions

    Official JCQ guidance · 2025–26 edition · accessed 4 August 2026

    Open source 9

  • JCQ — reasonable adjustments for the practical endorsement

    Official JCQ guidance · effective 1 September 2025 · accessed 4 August 2026

    Open source 10

  • WJEC — AS/A-level Chemistry

    Official qualification page · accessed 4 August 2026

    Open source 11

  • Qualifications Scotland — Higher and Advanced Higher Chemistry

    Official qualification page · 2026 · accessed 4 August 2026

    Open source 12

  • Imperial College London — Chemistry admissions

    Official university admissions page · accessed 4 August 2026

    Open source 13

  • UCL — undergraduate entry requirements

    Official university admissions page · accessed 4 August 2026

    Open source 14

  • Oxford Chemistry — admissions

    Official university admissions page · accessed 4 August 2026

    Open source 15

  • Latimer Tuition — A-level Chemistry tuition

    Latimer Tuition service page · accessed 4 August 2026

    Open source 16

Related guidance

More guidance from this section

More guidance from this part of the Ed Centre that may help with the same decision, stage or next step.

Support and clarity

Frequently asked questions

Straight answers to the questions people ask most often.

Is the A-level Chemistry practical endorsement one practical exam?

No. In England it is a non-examination assessment based on evidence gathered by teachers across the course. Practical knowledge and experimental reasoning are assessed separately in the written papers.

Does the practical endorsement count towards my A-level grade?

No. The written examination result and the endorsement result are calculated separately. A practical Pass adds no marks, and Not Classified does not by itself remove an A-level examination grade.

Do I pass by attending 12 practicals?

Not automatically. The practical programme must cover the required skills, apparatus and techniques, and your teacher needs enough evidence that you meet every CPAC area consistently and routinely.

What happens if I get Not Classified in the practical endorsement?

Not Classified is the official separate outcome when a Pass is not awarded. It does not change the written A-level grade, but it can matter where a university or course requires a Pass separately.

Can a private candidate take the practical endorsement?

Yes, but the entering centre must be able to provide the practical programme, supervise and authenticate the work, assess CPAC and administer the entry. Booking the written papers alone is not enough, so confirm the full provision, dates and fees before paying.

Can I carry a practical endorsement Pass forward when resitting?

Usually, subject to the current board and entry arrangements. Tell the entering centre about the existing result before it makes any new practical entry.

Does AS Chemistry have the same separate practical endorsement?

No. The separately reported endorsement belongs to the full reformed A-level. AS Chemistry can still include practical teaching and written assessment of practical skills.

Do universities require the A-level Chemistry practical endorsement?

Some do. Current examples include UCL’s general undergraduate requirements and Chemistry at Oxford and Imperial. Requirements still vary by university, course, applicant circumstances and entry year, so use the current admissions page for the exact course.

Sources and references

Sources and references

Official guidance

Internal pages