📚 OCR Year 7 Economics: Key Points for Practical Assessments | OCR七年级经济学：实践考核要点
Welcome to this guide on practical assessments in Year 7 OCR Economics. Practical work helps you understand economic ideas by doing real-world investigations, such as surveys, market simulations and budget planning. In these assessments, your ability to plan, collect data, present findings, analyse and evaluate is what really earns the marks. This article sets out the essential points step by step so you can aim for your best grade.
欢迎阅读这份 OCR 七年级经济学实践考核指南。实践作业通过真实世界的调查帮助你理解经济学概念，例如问卷调查、市场模拟和预算规划。在这类考核中，真正拿分的是你的计划能力、数据收集能力、展示能力、分析能力与评估能力。本文将按步骤为你梳理取得最佳成绩的关键要点。
1. Understanding the Assessment Task | 理解考核任务
Practical assessment in OCR Year 7 Economics is not a memory test. It asks you to carry out a small economic investigation and then explain what the evidence shows. The first step is to read the assignment brief carefully, line by line, and underline the command words: 'plan', 'collect', 'present', 'analyse' and 'evaluate'.
OCR 七年级经济学的实践考核不是记忆测验，而是要求你完成一项小型经济学调查，然后解释证据说明了什么。第一步是逐行仔细阅读作业要求，划出指令词："计划""收集""展示""分析""评估"。
Then ask yourself three simple questions: What exactly am I investigating? What evidence do I need? How will my work be marked? Writing the answers at the top of your notes keeps the whole project focused and stops you wasting time on parts that carry few marks.
然后问自己三个简单问题：我究竟在研究什么？我需要哪些证据？我的作业将如何评分？把答案写在笔记开头，能让整个项目保持聚焦，也避免你把时间浪费在分值很低的部分上。
Break the task into smaller parts and make a checklist of deliverables. A typical practical project has four:
把任务拆成更小的部分，并制作一份交付物清单。一个典型的实践项目通常包含四样东西：
- A written plan with your research question and method | 一份写明研究问题与方法的书面计划
- A raw data file (your original results) | 一份原始数据文件（你最原始的结果）
- At least one table and one graph | 至少一个表格和一个图表
- A short written report with a conclusion | 一份含结论的简短报告
If any requirement is unclear, ask your teacher early. Clarifying a doubt before you start saves far more time than discovering the mistake after you have collected all your data.
如果有任何要求不清楚，请尽早询问老师。在开始之前澄清疑问，远比收集完所有数据后才发现错误要节省时间。
2. Identifying the Core Economic Concept | 确定核心经济学概念
Every practical task is built around one or two core concepts from the Year 7 course. The most common are consumer choice, price elasticity, or opportunity cost, scarcity, demand and supply, and price elasticity. Identify which concept your task is testing before you design anything.
每一项实践任务都围绕七年级课程中的一两个核心概念展开。最常见的包括消费者选择、机会成本、稀缺性、需求与供给、价格弹性。在设计任何东西之前，先确认你的任务在考查哪个概念。
A useful next step is to turn the concept into a research question and a hypothesis. For example: 'How does price affect the snack choices of Year 7 students?' with the hypothesis 'Most Year 7 students will choose the cheaper of two similar snacks.'
下一步很实用：把概念转化为一个研究问题和一条假设。例如："价格如何影响七年级学生的零食选择？"假设为"大多数七年级学生会在两种相似零食中选择更便宜的那一种"。
Write short definitions of your key terms in your own words. If you cannot define 'opportunity cost' or 'demand' in one sentence, you will struggle to analyse your data later. Remember that opportunity cost is the value of the next best alternative you give up when you make a choice.
用自己的话写出关键词的简短定义。如果你不能用一句话定义"机会成本"或"需求"，后面分析数据时就会很吃力。记住，机会成本是你做出选择时所放弃的次优选项的价值。
3. Decoding the Mark Scheme and Rubric | 解读评分方案与评分标准
Always check the mark scheme or rubric before you start. Teachers usually award marks under five headings: planning, data collection, presentation, analysis and evaluation. The table below shows a typical distribution - always check your own version first.
开始之前一定要查看评分方案或评分标准。老师通常按五个方面给分：计划、数据收集、展示、分析和评估。下表是常见的分数分布——但请务必先核对你手上那一份的具体要求。
| Assessment area | 评分板块 | What it means | 含义 | Typical share | 常见占比 |
| Planning | 计划 | Research question, method, timeline | 研究问题、方法、时间表 | 15% |
| Data collection | 数据收集 | Accuracy, sample size, recording | 准确性、样本量、记录方式 | 20% |
| Presentation | 展示 | Tables, graphs, labels, units | 表格、图表、标注、单位 | 15% |
| Analysis | 分析 | Calculations, explanation of patterns | 计算、对规律的说明 | 30% |
| Evaluation | 评估 | Limitations and improvements | 局限与改进建议 | 20% |
Use the mark scheme as a checklist rather than reading it once. Highlight the sentence that describes the top band, then aim every paragraph of your report at that sentence.
把评分方案当作检查清单来用，而不是只读一遍。把描述最高等级的那句话划出来，然后让你报告的每一段都朝那句话靠拢。
Notice where the biggest marks sit. Analysis and evaluation usually carry more weight than neat handwriting or colourful graphs, so never spend all your time on presentation and leave no time for explanation.
注意分值最集中的地方。分析和评估通常比工整的字迹或漂亮的彩色图表更值分，所以千万别把时间全花在美化展示上，结果没时间写解释。
4. Planning Your Investigation | 制定调查计划
A good plan is about one page long and answers: what will I do, when, where, with whom, and what might go wrong? Include a simple timeline with dates for drafting questions, piloting, collecting data and writing up.
一份好的计划大约一页，回答几个问题：我要做什么、什么时候做、在哪里做、对谁做、可能出什么问题？列出简单的时间表，写明起草问题、预测试、收集数据和撰写报告的日期。
Think about practicalities before you start. How many people will you ask? How long will each survey take? Do you need permission to survey outside the classroom? How will you keep responses anonymous?
开始前先考虑现实条件。你要问多少人？每份问卷要花多久？在教室之外做调查是否需要许可？你如何保证答卷匿名？
Finally, plan for ethics and accuracy. Tell participants what the data is for, keep names out of your data file, and never invent or 'tidy up' results. Made-up data is treated as malpractice and can lead to a zero mark, however good the rest of the report looks.
最后，要计划好伦理与准确性。告诉参与者数据的用途，数据文件中不要出现姓名，并且绝不要编造或"修饰"结果。虚构数据属于学术不端，可能导致零分，无论报告的其他部分写得多好。
5. Collecting Reliable Primary Data | 收集可靠的一手数据
Primary data is data you collect yourself: your own survey, your own price check in a local shop, your own record of trades in a simulation. Secondary data is data someone else collected, such as government statistics, a textbook table or a news report.
一手数据是你自己收集的数据：你自己的问卷、你在本地商店做的价格调查、你在模拟中记录的成交情况。二手数据是别人收集的数据，例如政府统计数据、教科书上的表格或新闻报道。
Record every observation in a table with a date, time and location. This matters because prices and choices change: a survey taken at 8:30 a.m. may give quite different answers from one taken after lunch.
把每一次观察都记录在表格里，并写明日期、时间和地点。这一点很重要，因为价格和选择会变化：早上 8:30 做的调查，结果可能与午餐后做的明显不同。
Keep your method identical for every participant. If you change your question halfway through, your results are no longer comparable, and your analysis becomes much weaker.
对每一位参与者都使用完全相同的方法。如果你中途改了问题，结果就不再具有可比性，你的分析也会大幅削弱。
6. Designing Surveys and Questionnaires | 设计问卷与调查表
Use closed questions (fixed options) when you need numbers you can count, and a small number of open questions when you want reasons. Keep the whole questionnaire short - five to eight questions is plenty for a Year 7 project.
当你需要可以统计的数字时，用封闭式问题（固定选项）；当你想要了解原因时，用少量开放式问题。整份问卷要保持简短——对七年级项目来说，五到八个问题就足够了。
Avoid leading questions such as 'Don't you agree that prices are too high?' because they push the respondent towards one answer. Avoid double-barrelled questions such as 'Is the canteen cheap and tasty?' because one answer cannot cover two separate ideas.
避免引导性问题，例如"你不觉得价格太高了吗？"，因为它会把受访者推向某个答案。也要避免双重问题，例如"食堂又便宜又好吃吗？"，因为一个答案无法同时涵盖两件不同的事。
Always pilot your questionnaire with three to five classmates first. A pilot reveals confusing wording, missing options and questions that take too long to answer, all before you waste 30 real responses.
一定要先找三到五位同学做预测试。预测试能发现措辞不清、选项缺失、答题耗时过长的问题，而且是在你浪费掉 30 份真实答卷之前就发现。
7. Sampling Methods and Representativeness | 抽样方法与代表性
Your sample is the group of people you actually collect data from, while the population is everyone you would ideally like to ask. A random sample gives every member of the population an equal chance of being chosen; a systematic sample takes every tenth person on a list; a stratified sample deliberately matches the proportions in the population, such as boys and girls or each year group.
样本是你实际收集数据的那群人，而总体是你理想上想调查的所有人。随机抽样让总体中每个成员被选中的机会相等；系统抽样是每隔十个人取一个；分层抽样则有意按总体中的比例选取，例如男女比例或各年级比例。
Convenience sampling - simply asking your friends - is the fastest method but the most biased, because your friends may share your tastes and your income. If you do use it, state that clearly in your evaluation instead of pretending it was random.
便利抽样——就是直接问你的朋友——是最快的方法，但偏差也最大，因为你的朋友可能与你有相似的偏好和零花钱水平。如果你确实用了这种方法，请在评估部分如实说明，而不是假装它是随机的。
A larger sample is usually more reliable, but a badly worded question asked 200 times is still bad data. Aim for at least 20 to 30 responses and always state your sample size clearly in your report.
样本越大通常越可靠，但一个措辞糟糕的问题问 200 遍依然是糟糕的数据。目标至少是 20 到 30 份答卷，并在报告中清楚写明你的样本量。
8. Market Simulations and Trading Games | 市场模拟与交易游戏
In a market simulation you play the role of a buyer or a seller. Buyers have a budget and a maximum price they are willing to pay; sellers have costs and a minimum price they will accept. A trade happens only when the two overlap.
在市场模拟中，你扮演买方或卖方。买方有预算和愿意支付的最高价格；卖方有成本和愿意接受的最低价格。只有当两者重合时，交易才会发生。
Record every trade in a table: buyer, seller, price and quantity. After the game, plot the prices to see where they cluster. That cluster is your estimate of the market price, and it is the equilibrium you will compare with the theory.
把每一笔成交都记在表格里：买方、卖方、价格和数量。游戏结束后，把价格画成图，看它们集中在哪个区间。这个集中区间就是你对市场价格的估计，也就是你要与理论进行对比的均衡价格。
Then link the game to theory. If buyers suddenly receive more money, demand shifts to the right and the market price rises. If sellers receive extra stock, supply shifts to the right and the price falls. Use the words 'shift', 'surplus' and 'shortage' correctly.
然后把游戏与理论联系起来。如果买方突然得到更多钱，需求曲线右移，市场价格上升。如果卖方获得更多存货，供给曲线右移，价格下降。要正确使用"移动""过剩"和"短缺"这些术语。
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