KS3 CAIE Engineering Summer Preview and Bridging Course | KS3 CAIE 工程：暑期预习与衔接课程

📚 KS3 CAIE Engineering Summer Preview and Bridging Course | KS3 CAIE 工程：暑期预习与衔接课程

Engineering shapes the world around us, from the bridges we cross and the phones we use to the clean water we drink. This summer preview and bridging course is designed to help you step confidently into Key Stage 3 Engineering studies. You will explore what engineers do, develop core technical skills, and discover how creative thinking combines with science and mathematics to solve real-world problems.

工程塑造了我们周围的世界，从我们跨越的桥梁、使用的手机到我们饮用的干净水源。这门暑期预习与衔接课程旨在帮助你自信地步入KS3工程学学习。你将探索工程师的工作内容，发展核心技术技能，并发现创造性思维如何与科学和数学结合来解决现实世界的问题。

1. What is Engineering? | 什么是工程？

Engineering is the application of scientific and mathematical principles to design, build, and improve structures, machines, systems, and processes. Engineers identify a problem, imagine solutions, plan carefully, create prototypes, test them, and then refine their designs. There are many branches, including civil, mechanical, electrical, electronic, chemical, and software engineering.

工程是应用科学和数学原理来设计、建造和改进结构、机器、系统和过程的一门学科。工程师确定问题，设想解决方案，仔细规划，创建原型，进行测试，然后改进他们的设计。工程有许多分支，包括土木、机械、电气、电子、化学和软件工程。

At KS3 level, you will focus on the common skills all engineers use: researching, modelling, testing, and evaluating. You will learn to think like an engineer by working on mini-projects that involve building simple circuits, constructing model bridges, or programming a robot to follow a line.

在KS3阶段，你将专注于所有工程师都使用的通用技能：研究、建模、测试和评估。你将通过参与小型项目来学习像工程师一样思考，这些项目包括搭建简单电路、建造桥梁模型或为机器人编程使其沿线路行走。

• Engineering turns ideas into reality through a structured process.
• 工程通过结构化的过程将创意变为现实。
• Engineers work in teams and use drawings, calculations, and models.
• 工程师团队合作，并使用图纸、计算和模型。

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2. The Engineering Design Process | 工程设计流程

The design process is at the heart of all engineering. It usually follows a cycle: define the problem, research, specify requirements, brainstorm solutions, choose the best idea, develop the design, build a prototype, test and evaluate, then communicate results. You will often go back and improve – this is called iteration.

设计流程是所有工程的核心。它通常遵循一个循环：定义问题，研究，明确要求，头脑风暴解决方案，选择最佳构思，深化设计，制作原型，测试和评估，然后交流结果。你常常需要回到前面进行改进——这被称为迭代。

For example, if asked to design a phone stand, you would first interview potential users, sketch several ideas, model one in cardboard, test it with a real phone, note where it slips or tips, and then strengthen the weak points. Documenting each step in a design portfolio is a key KS3 skill.

例如，如果要求设计一个手机支架，你会首先采访潜在用户，绘制几个构思草图，用纸板制作一个模型，用真实手机测试它，记录哪里会滑动或翻倒，然后加强薄弱环节。在设计作品集中记录每一步是KS3的一项关键技能。

• Define the problem clearly before you start sketching.
• 在开始画草图之前，先明确定义问题。
• Always consider the user’s needs and the environment.
• 始终考虑用户的需求和使用环境。
• Prototype quickly using low-cost materials like card, foam board, or clay.
• 使用低成本材料如卡纸、泡沫板或粘土快速制作原型。

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3. Health and Safety in Engineering | 工程中的健康与安全

Safety is the first rule in any workshop or laboratory. Before touching any tool or machine, you must learn how to use it safely and wear the correct personal protective equipment (PPE), such as safety glasses, aprons, and enclosed shoes. You must know where the emergency stop buttons, fire extinguishers, and first aid kits are located.

安全是任何工作坊或实验室的第一守则。在接触任何工具或机器之前，你必须学会如何安全使用它，并穿戴正确的个人防护装备（PPE），例如护目镜、工作围裙和包趾鞋。你必须知道紧急停止按钮、灭火器和急救箱的位置。

A risk assessment is a written process where you identify what could cause harm and decide how to control the risks. In KS3, you will carry out simple risk assessments before using a soldering iron, a hand drill, or a hot glue gun. Always tie back long hair, roll up sleeves, and never run in the workshop.

风险评估是一个书面过程，你要辨识什么可能造成伤害，并决定如何控制风险。在KS3阶段，你在使用电烙铁、手钻或热熔胶枪之前，都要进行简单的风险评估。始终把长发扎起，卷起袖子，绝不在工作坊里奔跑。

Hazard + Risk = Harm → Control measures must be applied

危险 + 风险 = 伤害 → 必须采取控制措施

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4. Materials and Their Properties | 材料及其性质

Selecting the right material is crucial. Engineers categorise materials into metals, polymers, ceramics, composites, and woods. Each has mechanical properties like strength, hardness, toughness, ductility, and stiffness, as well as physical properties like density, thermal conductivity, and electrical conductivity.

选择正确的材料至关重要。工程师将材料分为金属、聚合物、陶瓷、复合材料和木材。每种材料都有力学性质，如强度、硬度、韧性、延展性和刚度，以及物理性质，如密度、导热性和导电性。

For example, copper is used in electrical wires because it has very high electrical conductivity, while aluminium is chosen for aircraft bodies because it has a high strength-to-weight ratio. You will test materials by bending, scratching, heating, and measuring mass and volume to calculate density.

例如，铜用于电线是因为它具有很高的导电性，而铝被选用于飞机机身是因为它具有高的强度-重量比。你将通过弯曲、划痕、加热以及测量质量和体积来测试材料并计算密度。

Material	Key Property	Common Use
Steel	High tensile strength	Bridges, car bodies
Copper	Excellent conductor	Wires, pipes
Acrylic (PMMA)	Transparent, tough	Windows, displays
Plywood	Stable, strong in layers	Furniture, flooring

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5. Forces and Structures | 力与结构

Forces such as tension, compression, bending, torsion, and shear act on all structures. A structure can be a bridge, a tower, a chair, or even a bicycle frame. Engineers use the concepts of equilibrium and load paths to ensure a structure can safely support the applied loads without collapsing or deforming too much.

力，如张力、压力、弯曲、扭转和剪切，作用于所有结构上。结构可以是一座桥、一座塔、一把椅子，甚至是一个自行车车架。工程师使用平衡和传力路径的概念，确保结构能够安全地承受施加载荷而不坍塌或变形过度。

Triangles are the strongest shape because they do not change shape when a load is applied – that is why you see so many triangular trusses in bridges and roofs. You will build model structures using spaghetti or drinking straws and test them to failure, noting the maximum load and the type of failure.

三角形是最坚固的形状，因为它们在受载时不会改变形状——这就是为什么你在桥梁和屋顶中看到如此多的三角桁架。你将用意面或吸管搭建模型结构，并进行破坏性测试，记录最大载荷和破坏类型。

Force (F) = mass (m) × acceleration (a) [F = m × a]

力 (F) = 质量 (m) × 加速度 (a) [F = m × a]

Stress = Force ÷ Cross-sectional area – this helps you understand why a thick cable is harder to break than a thin one.

应力 = 力 ÷ 横截面积 – 这有助于你理解为什么一根粗电缆比细的更难拉断。

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6. Mechanical Systems | 机械系统

Mechanical systems transfer and transform motion and force. Simple machines such as levers, pulleys, gears, and linkages multiply force or change the direction of movement. For instance, a lever uses a pivot (fulcrum) to lift a heavy load with a smaller effort if the effort is applied farther from the fulcrum.

机械系统传递并转化运动和力。简单机械如杠杆、滑轮、齿轮和连杆机构可以放大力量或改变运动方向。例如，杠杆利用一个支点，如果施力点离支点更远，就可以用较小的力提起重物。

Gears can change speed and torque. A small driver gear turning a larger driven gear increases torque but decreases speed, while the opposite ratio increases speed but reduces torque. You will experiment with gear ratio calculations and build simple mechanisms using construction kits.

齿轮可以改变速度和扭矩。一个小主动齿轮带动一个大从动齿轮会增加扭矩但降低转速，而相反的齿比则会增加转速但降低扭矩。你将通过实验进行齿比计算，并使用搭建套件制作简单机构。

Gear ratio = Number of teeth on driven gear ÷ Number of teeth on driver gear

齿比 = 从动齿轮齿数 ÷ 主动齿轮齿数

• Levers are classed into three types based on the position of fulcrum, effort, and load.
• 杠杆根据支点、动力和阻力的位置分为三类。
• Pulleys can provide mechanical advantage: a system with 4 supporting ropes needs only 1/4 of the load as effort (ignoring friction).
• 滑轮可以提供机械利益：一个有4根支持绳的系统只需载荷1/4的力（忽略摩擦）。

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7. Introduction to Electronics | 电子学入门

Electronics is the heart of modern control systems. A basic circuit consists of a power source (battery), conductors (wires), and a load (such as an LED or motor). You will learn to read circuit diagrams, identify symbols for resistors, capacitors, transistors, and diodes, and understand the difference between series and parallel circuits.

电子学是现代控制系统的核心。一个基本电路由电源（电池）、导体（导线）和负载（如LED或电机）组成。你将学习阅读电路图，辨识电阻、电容、晶体管和二极管的符号，并理解串联和并联电路的区别。

Ohm’s law links voltage, current, and resistance. When you design an LED circuit, you calculate the correct current-limiting resistor to prevent the LED from burning out. You will build simple sensor circuits using light-dependent resistors (LDRs) or thermistors to react to the environment.

欧姆定律将电压、电流和电阻联系起来。当你设计LED电路时，你要计算正确的限流电阻以防止LED烧坏。你将使用光敏电阻（LDR）或热敏电阻搭建简单的传感器电路，以对环境作出反应。

Voltage (V) = Current (I) × Resistance (R) [V = I × R]

电压 (V) = 电流 (I) × 电阻 (R) [V = I × R]

Series circuits have one path for current, so current is the same everywhere and voltages add up. Parallel circuits offer multiple paths, so voltage stays the same across each branch while currents split.

串联电路只有一条电流路径，因此各处电流相同，而电压相加。并联电路提供多条路径，因此各支路电压相同，而电流分流。

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8. Programming and Control | 编程与控制

Many engineering projects now include a programmable microcontroller such as a BBC micro:bit or an Arduino. You can write code that reads data from sensors (input), processes it, and triggers actuators (output) like LEDs, buzzers, or motors. This is the basis of automation and robotics.

现在许多工程项目都包括可编程微控制器，如BBC micro:bit或Arduino。你可以编写代码，从传感器读取数据（输入），进行处理，并触发执行器（输出），如LED、蜂鸣器或电机。这就是自动化和机器人技术的基础。

You will start with block-based coding, which is great for learning logic, loops, and conditional statements. For example, you might write a program that turns on a fan when the temperature exceeds 25°C, or that counts how many times a button is pressed and displays the number on an LED matrix.

你将从基于积木块的编码开始，这对学习逻辑、循环和条件语句非常有益。例如，你可能会编写一个程序，当温度超过25°C时开启风扇，或者计算按钮被按下的次数并将数字显示在LED点阵上。

This bridges to computational thinking: breaking down a problem, recognising patterns, abstracting, and designing algorithms. These skills are transferable to all engineering disciplines.

这衔接了计算思维：分解问题、识别模式、抽象化以及设计算法。这些技能可迁移至所有工程学科。

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9. Energy, Power and Sustainability | 能源、动力与可持续性

Engineers play a major role in generating, distributing, and using energy efficiently. Renewable sources like solar, wind, hydro, and tidal power are increasingly important to reduce carbon emissions. Non-renewable sources like coal, oil, and natural gas are finite and have greater environmental impact.

工程师在能源的高效产生、分配和使用中扮演着重要角色。太阳能、风能、水能和潮汐能等可再生能源对于减少碳排放日益重要。煤、石油和天然气等不可再生能源是有限的，并且对环境的影响更大。

When you design a product, you must think about its entire lifecycle: extracting raw materials, manufacture, transport, use, and disposal. This is called lifecycle assessment (LCA). Choosing materials that are recyclable, designing for easy repair, and minimising energy consumption are all part of sustainable engineering.

当你设计产品时，你必须考虑它的整个生命周期：原材料提取、制造、运输、使用和废弃处理。这被称为生命周期评估（LCA）。选择可回收的材料、设计易于维修的产品以及最小化能源消耗，都属于可持续工程的范畴。

Power is the rate of doing work. A machine that lifts a weight quickly has a higher power rating than one that lifts the same weight slowly. Efficiency compares useful output energy to total input energy – no machine is 100% efficient due to friction and heat loss.

功率是做功的速率。一台快速提升重物的机器比一台缓慢提升同样重物的机器具有更高的额定功率。效率将有用的输出能量与总输入能量进行比较——由于摩擦和热量损失，没有任何机器是100%高效的。

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10. Manufacturing and Making | 制造与制作

Taking a design from paper or screen to a physical object involves choosing suitable manufacturing processes. At KS3, you will use both hand tools and basic machines. Additive methods build up material, like 3D printing or glueing layers of card. Subtractive methods remove material, such as sawing, filing, and drilling.

将设计从纸面或屏幕变为实物涉及选择合适的制造工艺。在KS3阶段，你将同时使用手动工具和基本机器。增材法是堆积材料，如3D打印或粘合卡纸层。减材法是去除材料，如锯、锉和钻。

Accuracy and quality control matter. You will learn to measure using a ruler, a caliper, and a try-square to check right angles. Marking out correctly before cutting saves wasted materials and time. Workshop habits like keeping your bench tidy and cleaning up after yourself are professional expectations.

精度和质量控制非常重要。你将学习使用直尺、游标卡尺和直角尺进行测量，以检查直角。切割前正确划线可以避免浪费材料和时间。保持工作台整洁和使用后自行清理等工作坊习惯是专业素养的要求。

• Marking out: use a scriber, centre punch, and marking gauge for metal; pencil and ruler for wood.
• 划线：金属使用划针、中心冲和平行划线规；木材使用铅笔和直尺。
• Joining methods: temporary (screws, bolts) and permanent (glue, solder, rivets).
• 连接方法：临时性（螺钉、螺栓）和永久性（胶水、焊接、铆钉）。

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11. Engineering Careers | 工程职业

Engineering offers a huge range of exciting careers. Civil engineers design bridges, tunnels, and skyscrapers. Mechanical engineers work on engines, turbines, and HVAC systems. Electrical engineers create power grids and consumer electronics. Biomedical engineers develop prosthetic limbs and medical imaging devices. Software engineers code apps and control systems for everything from cars to spacecraft.

工程提供了大量令人兴奋的职业选择。土木工程师设计桥梁、隧道和摩天大楼。机械工程师从事发动机、涡轮机和暖通空调系统的工作。电气工程师创建电网和消费电子产品。生物医学工程师开发假肢和医学成像设备。软件工程师为从汽车到航天器的各种设备编写应用程序和控制系统。

There is also a growing demand for environmental and sustainability engineers who design renewable energy systems and waste treatment plants. KS3 engineering gives you a taste of all these fields so you can discover what you enjoy most.

对设计可再生能源系统和废物处理厂的环境与可持续性工程师的需求也在增长。KS3工程学让你初步体验所有这些领域，以便你发现自己最喜欢的领域。

Role models like the engineers who designed the International Space Station or clean water systems in remote villages show that engineering is a profession that improves lives. You do not need to be a genius – curiosity, persistence, and teamwork matter more.

像设计了国际空间站或偏远村庄净水系统的工程师这样的榜样表明，工程是改善生活的职业。你不需要是天才——好奇心、毅力和团队合作更重要。

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12. Bridging to KS3: Key Skills | 衔接KS3：关键技能

Moving into KS3 Engineering is an opportunity to develop a way of thinking, not just technical facts. You should practise these skills over the summer: careful observation, sketching ideas in 2D and 3D, measuring accurately, asking ‘how does it work?’ whenever you see a product, and thinking of ways to improve everyday objects.

进入KS3工程学是一个发展思维方式的机会，而不仅仅是学习技术事实。你应该在暑假期间练习这些技能：仔细观察，用二维和三维草图记录想法，准确测量，每当看到一个产品时问“它是如何工作的？”，并思考改进日常物品的方法。

Keep an ‘engineer’s notebook’ where you draw ideas, paste pictures of inspiring structures or mechanisms, and write down problems you would like to solve. Building simple kits or taking apart an old gadget safely (unplugged, with supervision) can help you understand how components fit together.

保持一本“工程师笔记本”，在其中绘制构思，粘贴令人启发之结构或装置的图片，并写下你想要解决的问题。搭建简单套件或在安全情况下（断电，有监督）拆解一个旧小装置，可以帮助你理解组件如何组合在一起。

Finally, remember that failure is part of learning. When a bridge model collapses or a circuit doesn’t light up, engineers analyse why and redesign. That mindset – resilient, curious, and reflective – is the strongest bridge into KS3 and beyond.

最后，请记住失败是学习的一部分。当桥梁模型倒塌或电路不亮时，工程师会分析原因并重新设计。这种心态——坚韧、好奇和善于反思——是进入KS3及更高阶段的最坚固桥梁。

Published by TutorHao | Engineering Revision Series | aleveler.com

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