📚 AS CCEA Science: 2026 Exam Changes and Trends | AS CCEA科学：2026年考试变化与趋势
The AS CCEA Science qualifications – encompassing Biology, Chemistry and Physics – are entering a significant period of redesign, with the 2026 examination series marking the first full assessment under revised specifications. These changes reflect the need for deeper conceptual understanding, enhanced practical skills and better alignment with higher education and STEM careers. In this article, we examine the key updates, unpack their implications for students and teachers, and outline effective preparation strategies.
CCEA AS科学资格（涵盖生物、化学和物理）正进入一个重要的重新设计期，2026年的考试系列将是首次依据修订后的教学大纲进行全面评估。这些变化反映了对更深入的概念理解、增强的实践技能以及更好地衔接高等教育和STEM职业的需求。在本文中，我们将审视关键更新内容，解读它们对学生和教师的影响，并勾勒有效的备考策略。
1. Why CCEA Is Revising AS Science | CCEA为何修订AS科学
A core driver behind the 2026 revision is alignment with the latest subject criteria issued by the regulators. CCEA has been tasked with ensuring that AS science subjects maintain rigour while reducing unnecessary content overload. Feedback from universities highlighted that students often held superficial knowledge of practical techniques, so the new specifications place greater emphasis on investigative thinking.
推动2026年修订的一个核心驱动因素是与监管机构发布的最新学科标准保持一致。CCEA的任务是确保AS科学科目既保持严谨性，又减少不必要的内容过载。来自大学的反馈指出，学生通常对实验技术只掌握表面知识，因此新大纲更加强调探究性思维。
Additionally, there has been a push to standardise certain aspects across Biology, Chemistry and Physics. For example, the mathematical requirements have been harmonised, meaning that all three subjects now expect a minimum 20% weighting for mathematical skills in written papers. This change alone signals a measurable shift in exam style.
此外，一直有推动在生物、化学和物理之间标准化某些方面的努力。例如，数学要求已统一，这意味着所有三门科目的笔试中数学技能的权重现在都至少占20%。仅这一变化就标志着考试风格的显著转变。
2. Overview of Qualification Structure in 2026 | 2026年资格结构总览
Each AS CCEA Science subject will continue to consist of two external examination units and a separate internal practical assessment. However, the weighting has been recalibrated: from 2026, AS Unit 1 will carry 40% and AS Unit 2 40% of the overall AS qualification, with the remaining 20% attributed to the Practical Skills Assessment (PSA). Previously, the PSA held a 15% weighting.
每门CCEA AS科学科目将继续由两个外部考试单元和一个独立的内部实践评估组成。然而，权重已重新校准：从2026年起，AS单元1将占总AS资格的40%，单元2占40%，剩余的20%归于实践技能评估（PSA）。此前，PSA的权重为15%。
The increased PSA weighting means that day‑to‑day practical work in the laboratory becomes even more critical. Students must demonstrate not only the ability to follow instructions but also to design, analyse and evaluate investigations. The PSA will be marked by teachers and externally moderated, with detailed criteria provided by CCEA.
PSA权重的提高意味着实验室中的日常实践工作变得更加关键。学生不仅需要展示遵循指令的能力，还必须展示设计、分析和评估探究的能力。PSA将由教师评分并由外部审核，CCEA会提供详细的评定标准。
3. Revised Assessment Objectives and Their Impact | 修订后的评估目标及其影响
The assessment objectives (AOs) have been restructured to reflect a stronger emphasis on application and analysis. The three AOs for 2026 are: AO1 (Knowledge and understanding) at 30-35%, AO2 (Application of knowledge and understanding) at 40-45%, and AO3 (Analysis, evaluation and practical skills) at 20-25%. This represents a shift from the older model where AO1 often dominated at above 40%.
评估目标（AO）已重组，以反映对应用和分析的更强重视。2026年的三个AO为：AO1（知识与理解）占30-35%，AO2（知识与理解的应用）占40-45%，AO3（分析、评价和实践技能）占20-25%。这代表了较旧模式的一个转变，旧模式中AO1通常占主导地位，超过40%。
Consequently, exam questions will feature fewer straightforward recall items. Students should expect extended response questions that require them to link multiple concepts, interpret unfamiliar data and evaluate experimental designs. In Chemistry, for instance, a question might give a set of thermodynamic data for a reaction and ask the student to assess the feasibility of two different synthesis pathways.
因此，考试题目将较少出现简单的回忆性题目。学生应预期出现需要他们联系多个概念、解释陌生数据和评估实验设计的扩展回答题目。例如在化学中，一道题可能会给出一组反应的热力学数据，并要求学生评估两种不同合成路径的可行性。
4. Content Updates in Biology | 生物学科的内容更新
The 2026 AS Biology specification introduces a dedicated section on epigenetics and gene expression, reflecting advances in molecular biology. Students will need to understand DNA methylation, histone modification and their role in phenotypic variation. This topic was previously only briefly mentioned in A2.
2026年AS生物教学大纲引入了关于表观遗传学和基因表达的专门章节，反映了分子生物学的进展。学生将需要理解DNA甲基化、组蛋白修饰及其在表型变异中的作用。这一主题此前仅在A2中简要提及。
Another notable addition is the integration of quantitative ecology. Learners must now calculate biodiversity indices such as Simpson’s Index of Diversity and interpret statistical tests, including the chi‑squared test, within ecological contexts. This reinforces the mathematical demand across sciences.
另一个显著的补充是定量生态学的整合。学习者现在必须在生态情境下计算生物多样性指数（如辛普森多样性指数）并解释统计检验，包括卡方检验。这强化了各科学科目对数学的要求。
The removal of certain legacy content, such as detailed plant anatomy of non‑vascular plants, has freed up time for deeper investigation of these modern topics. The core principles of cell structure, biochemistry and physiology remain, but now are taught with a stronger focus on experimental evidence.
某些遗留内容（如非维管植物的详细解剖）的删除，为更深入探究这些现代主题腾出了时间。细胞结构、生物化学和生理学的核心原理仍然保留，但现在的教学更侧重于实验证据。
5. Content Updates in Chemistry | 化学学科的内容更新
In AS Chemistry, the 2026 specification reshapes the organic chemistry section to include mechanisms earlier in the course. Students will encounter nucleophilic substitution and elimination reactions in Unit 1, alongside foundational concepts of enthalpy and bonding. This allows for a spiral curriculum approach, revisiting mechanisms with greater depth later.
在AS化学中，2026年大纲重新调整了有机化学部分，将反应机理更早地引入课程。学生将在单元1中遇到亲核取代和消除反应，同时还有焓和键合的基础概念。这允许采用螺旋式课程方法，在后续更深入地重新审视机理。
The mathematical toolkit has expanded to require competency in using logarithmic relationships, specifically in the context of pH calculations and the Henderson–Hasselbalch approximation for buffer systems. The relevant formula is now given in the exam data booklet, but students must select and apply it correctly.
数学工具包已扩展，要求在pH计算和缓冲体系亨德森－哈塞尔巴尔赫近似的情境下，能够使用对数关系。相关公式现在在考试数据手册中给出，但学生必须正确选择和应用它。
pH = pKₐ + log₁₀([A⁻] / [HA])
Practicals now include mandatory titrations with pH probes and data logging, moving away from single‑indicator titrations. Students are expected to compare calculated and measured pH values, assessing sources of error in their procedures.
实践现在包括使用pH探头和数据记录仪的强制滴定，告别仅使用单一指示剂的滴定。学生需要比较计算和测量的pH值，评估其程序中的误差来源。
6. Content Updates in Physics | 物理学科的内容更新
The AS Physics specification for 2026 puts a sharper focus on wave‑particle duality and quantum phenomena. The photoelectric effect is now treated quantitatively, requiring use of the Einstein equation Ek max = hf – Φ, with data analysis of stopping potential versus frequency. This topic shifts from a qualitative description to a full mathematical treatment.
2026年AS物理教学大纲更聚焦于波粒二象性和量子现象。光电效应现在以定量方式处理，要求使用爱因斯坦方程Ek max = hf – Φ，并进行截止电压对频率的数据分析。这一主题从定性描述转变为完整的数学处理。
In mechanics, the use of vector notation and free‑body diagrams is formalised. Students must now resolve vectors into components using trigonometric methods in a wider variety of contexts, including inclined planes with friction and pulley systems with variable masses. The emphasis on ‘thinking with vectors’ increases the demand for spatial reasoning.
在力学中，矢量的使用和受力图被正式化。学生现在必须在更广泛的情境中使用三角函数方法将矢量分解为分量，包括有摩擦的斜面和可变质量的滑轮系统。对“用矢量思考”的强调增加了对空间推理的要求。
Practical skills now include mandatory use of digital oscilloscopes and light gates, replacing many traditional analogue experiments. Students will be assessed on their ability to capture, process and present data using software, mirroring modern laboratory practice.
实践技能现在包括强制使用数字示波器和光门，取代了许多传统的模拟实验。学生将接受评估，看其能否使用软件捕捉、处理并呈现数据，反映了现代实验室实践。
7. The Practical Skills Assessment (PSA) in Detail | 实践技能评估（PSA）详解
The PSA will be internally assessed under controlled conditions but will follow a standardised set of activities designed by CCEA. For 2026, each science subject will have a pool of 12 prescribed practical activities, of which each centre must select a minimum of eight to carry out with students. The teacher then assesses students in three designated activities that cover planning, implementing and analysing.
PSA将在受控条件下进行内部评估，但将遵循CCEA设计的一套标准化活动。2026年，每门科学科目将有12个规定实验活动池，每个中心必须从中选择至少8个与学生一起实施。然后教师在三个指定的活动中评估学生，这些活动涵盖规划、实施和分析。
The mark scheme for PSA now includes a specific criterion for ‘evaluation of uncertainties and errors’. Students must calculate percentage uncertainties, distinguish between systematic and random errors, and suggest realistic improvements. This directly feeds into AO3 and rewards precise scientific language.
PSA的评分方案现在包含一项关于“不确定度和误差评价”的具体标准。学生必须计算百分不确定度，区分系统误差和随机误差，并提出切实可行的改进建议。这直接服务于AO3，并奖励精确的科学语言。
| Criterion | Marks | Key evidence |
|---|---|---|
| Planning | 6 | Hypothesis, variables, risk assessment |
| Implementing | 6 | Data range, repeats, equipment use |
| Analysis & Evaluation | 8 | Graphs, uncertainties, conclusions |
Centres must retain student work for moderation visits. Digital portfolios are encouraged, containing scanned lab notes, photographs of apparatus and computer‑generated graphs. This modernised evidence trail reduces paperwork and improves authenticity checks.
各中心必须保留学生作品以供审核访问。鼓励采用数字档案，包含扫描的实验室笔记、仪器照片和计算机生成的图表。这种现代化的证据线索减少了文书工作并提高了真实性检查。
8. Digital Examination and Question Format Trends | 数字化考试与题型趋势
While CCEA has not moved to fully on‑screen assessment for 2026, selected papers will include digital appendices, such as interactive data sets and colour images, accessed via a secure online platform. In Chemistry, this might involve a rotatable 3D model of a molecule; in Physics, a video of an oscillating system from which measurements must be taken.
虽然CCEA尚未在2026年转向完全机考，但选定的试卷将包括数字附录，如可通过一个安全在线平台访问的互动数据集和彩色图像。在化学中，这可能涉及分子的可旋转3D模型；在物理中，可能是一个振荡系统的视频，学生需从中进行测量。
Question styles are also evolving. There will be more multi‑step calculation items with structured sub‑parts, deliberately designed to prevent students from bypassing conceptual steps. In Biology, data‑response questions now often embed a short statistical test task, blending mathematics with subject content.
题型也在演变。将会有更多带有结构化子部分的多步骤计算题，刻意设计以防止学生绕过概念步骤。在生物中，数据响应题现在经常嵌入一个简短的统计检验任务，将数学与学科内容融合。
Extended writing questions (worth 6 marks or more) will be marked using a ‘levels of response’ grid. Examiners will look for logical structuring, accurate use of scientific terminology and the ability to weigh up evidence. Superficial, list‑like answers will not access the higher mark bands.
扩展写作题（分值6分或以上）将使用“回答等级”评分表来评分。考官将寻找逻辑结构、准确使用科学术语以及权衡证据的能力。肤浅的清单式回答将无法进入高分档。
9. Grade Boundaries and Performance Standards | 等级分数线与表现标准
With the adjustments in specification content and assessment design, CCEA has signalled that grade boundaries in the first 2026 sitting will be set using a combination of expert judgement and statistical evidence. The aim is to maintain comparable outcomes with previous years, but the increased difficulty of AO2- and AO3‑focused questions may result in slightly lower raw mark thresholds for grades A and B.
随着大纲内容和评估设计的调整，CCEA已表示第一次2026年考试的等级分数线将综合使用专家判断和统计证据来设定。目标是与往年保持可比的结果，但由于侧重AO2和AO3的题目难度增加，可能会使A和B等级的原卷分数阈限略微降低。
For the PSA, separate grade descriptors have been published. To achieve a top mark, students must demonstrate initiative, for example by identifying an anomaly during data collection and deciding to take an additional reading without prompting. This raises the bar for genuine investigative skill.
针对PSA，已发布单独的等级描述符。要获得最高分，学生必须展示主动性，例如在数据收集过程中识别出异常值，并在未被提示的情况下决定额外采集一个读数。这提高了对真正探究技能的要求。
Awarding bodies have confirmed that UMS (Uniform Mark Scale) conversions will continue, providing a safety net for performance variations across different assessment units. The UMS thresholds for 2026 will be published shortly after the first examination session.
颁证机构已确认将继续使用UMS（统一分数量表）转换，为不同评估单元间的表现差异提供安全网。2026年的UMS阈值将在第一次考试结束后不久公布。
10. Implications for Teaching and Classroom Practice | 对教学和课堂实践的影响
Teachers are adapting schemes of work to embed more opportunities for student‑led inquiry. Instead of demonstration experiments, lessons now pivot to structured investigations where learners formulate hypotheses, select apparatus and present findings. This shift requires more flexible laboratory timetabling and investment in modern data‑logging equipment.
教师们正在调整教学计划，以嵌入更多学生主导的探究机会。课堂不再只是教师演示实验，而是转向结构化的探究，学习者提出假设、选择仪器并展示发现。这一转变需要更灵活的实验室时间安排和对现代数据记录设备的投资。
Cross‑curricular collaboration between science and mathematics departments has become essential. Many schools now run joint workshops on handling uncertainties, logarithmic functions and statistical tests. This collaborative approach ensures that students see the maths as a tool, not an isolated exercise.
科学和数学系之间的跨课程合作变得至关重要。许多学校现在举办关于处理不确定度、对数函数和统计检验的联合工作坊。这种合作方法确保学生将数学视为工具，而不是孤立的练习。
Formative assessment strategies have also been refreshed. Teachers are using mock PSA tasks and levelled mark schemes to provide detailed feedback on practical write‑ups, focusing on the language of error analysis and the justification of conclusions. Regular self‑ and peer‑assessment helps students internalise the standards required for AO3.
形成性评估策略也得到刷新。教师使用模拟PSA任务和分层评分方案，对实验报告提供详细反馈，重点放在误差分析的语言和结论的论证上。定期的自我评估和同侪评估帮助学生内化AO3所需的标准。
11. Preparation Strategies for Students | 学生备考策略
Successful preparation for the 2026 AS Science exams demands a proactive approach. Begin by downloading the latest specification and the specimen assessment materials from the CCEA website. Map your revision against the content statements and the associated ‘opportunities for practical work’ listed in the specification.
成功备考2026年AS科学考试需要采取主动的方式。首先，从CCEA网站下载最新大纲和样题评估材料。将你的复习大纲中的内容陈述以及列出的“实践工作机会”对应起来。
Build a personal glossary of command words. Words such as ‘evaluate’, ‘discuss’ and ‘justify’ signal different demands. Practising with past papers is still valuable, but focus on the new specimen questions for 2026 that model the increased AO2 and AO3 weighting. For each question you attempt, write a brief note on which AO is being targeted.
建立个人的指令词词汇表。“评估”、“讨论”和“论证”等词预示着不同的要求。练习历年真题仍然有价值，但要重点关注2026年的新样题，这些题目模拟了增加的AO2和AO3权重。对于你尝试做的每一道题，写一个简短笔记说明它针对的是哪个AO。
In the laboratory, keep a dedicated practical logbook. Record every investigation in detail, including your initial hypothesis, any variations in method, raw data, calculations of means and uncertainties, and a reflective conclusion. This logbook will serve as a revision resource and as evidence for your PSA portfolio.
在实验室里，保持一本专用的实验日志。详细记录每一次探究，包括你最初的假设、方法的任何变化、原始数据、平均值和不确定度的计算，以及反思性结论。这本日志将作为复习资源和你的PSA档案的证据。
Finally, engage in active retrieval. Use flashcards for definitions, practise drawing and labelling diagrams from memory, and explain scientific concepts aloud to a study partner. This dual coding and elaboration deepens understanding beyond rote memorisation.
最后，进行主动提取。使用抽认卡记忆定义，练习凭记忆绘图和标注图表，并向学习伙伴大声解释科学概念。这种双重编码和精细加工能够加深理解，超越死记硬背。
12. Looking Ahead: Future Trends Beyond 2026 | 展望未来：2026年以后的趋势
The 2026 changes are not an endpoint but part of a broader evolution in science assessment. CCEA has indicated that from 2028, a greater proportion of marks may be derived from synoptic questions that cross the boundary between AS and A2 content. This encourages schools to teach the full A‑level course coherently from the start.
2026年的变化不是终点，而是科学评估更广泛演变的一部分。CCEA已表示，从2028年起，更大比例的分数可能来自跨越AS和A2内容界限的综合题。这鼓励学校从一开始就连贯地教授完整的A-level课程。
Climate science and sustainability are emerging as unifying themes across Biology, Chemistry and Physics. Future specifications could include mandatory contexts such as life‑cycle analysis, green chemistry principles and renewable energy physics. Students would be assessed not only on core science but on their ability to apply it to global challenges.
气候科学和可持续性正成为贯穿生物、化学和物理的统一主题。未来大纲可能包括强制性情境，如生命周期分析、绿色化学原理和可再生能源物理学。学生不仅要在核心科学上接受评估，还要评估他们将其应用于全球挑战的能力。
Finally, the role of artificial intelligence in science education is being explored. While AI‑assisted marking is still under trial, it is likely that eventually CCEA will leverage AI to provide quicker, more detailed feedback on practical portfolios. Students should therefore become comfortable with digital submission platforms and basic data analysis software.
最后，人工智能在科学教育中的作用正在探索中。虽然AI辅助评分仍在试验中，但CCEA最终很可能利用AI对实践档案提供更快捷、更详细的反馈。因此，学生应该熟悉数字提交平台和基本的数据分析软件。
Published by TutorHao | Science Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
屏轩国际教育cambridge primary/secondary checkpoint, cat4, ukiset,ukcat,igcse,alevel,PAT,STEP,MAT, ibdp,ap,ssat,sat,sat2课程辅导，国外大学本科硕士研究生博士课程论文辅导