Evaluate
KS3DT-KS3-D003
Analysing the work of past and present professionals; investigating new and emerging technologies; testing, evaluating and refining products against design specifications and considering ethical, environmental and social dimensions.
National Curriculum context
Evaluation at KS3 expands significantly in scope to include investigation of new and emerging technologies - drones, artificial intelligence, 3D printing, smart materials - as transformative forces in design and technology. Pupils also develop understanding of how key events and individuals in design and technology have shaped the world, giving historical and cultural perspective on the subject as a discipline. Most significantly, evaluation at KS3 is expected to engage with the broader consequences of design decisions: the ethical implications of product use, the environmental impact of materials and manufacturing processes, and the social consequences of design choices. This introduces pupils to the idea that designers have responsibilities that extend beyond the functional requirements of a brief.
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Concepts
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Clusters
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Prerequisites
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With difficulty levels
Lesson Clusters
Evaluate designs and products against ethical and sustainability criteria
practice CuratedEthical and sustainable design is the sole concept in the KS3 Evaluate domain, extending evaluation beyond functional criteria to include environmental impact, supply chain ethics and social responsibility — a key expansion of the evaluative skill set at secondary level.
Teaching Suggestions (2)
Study units and activities that deliver concepts in this domain.
3D Printing: Design for Additive Manufacture
Design & Technology Design, Make, EvaluatePedagogical rationale
3D printing introduces additive manufacture -- building objects layer by layer rather than cutting from a block. Pupils learn 3D CAD modelling, understand the capabilities and limitations of FDM printing (layer resolution, support structures, infill percentage), and design products that exploit the unique advantages of additive manufacture (complex geometries impossible by subtractive methods). This is the most industry-relevant emerging technology in the KS3 DT curriculum.
Sustainable Design Challenge: Upcycled Product
Design & Technology Design, Make, EvaluatePedagogical rationale
An upcycling design challenge forces pupils to work within material constraints -- the available waste materials define the design possibilities. This teaches sustainable design thinking: considering the environmental impact of material choices, the lifecycle of products, and the concept of circular design. Pupils investigate real-world sustainability issues (plastic waste, fast fashion, planned obsolescence) and respond with a designed product that gives waste materials a new, functional life.
Prerequisites
Concepts from other domains that pupils should know before this domain.
Concepts (1)
Ethical and Sustainable Design
knowledge Guided MaterialsDT-KS3-C004
Ethical design considers the consequences of design decisions for users, workers in the supply chain, communities and the broader environment. Sustainable design aims to meet current needs without compromising the ability of future generations to meet their own needs, considering the environmental impact of materials extraction, manufacturing, product use and end-of-life disposal. At KS3, pupils develop the analytical frameworks to evaluate products and their own designs from ethical and environmental perspectives, understanding that designers have responsibilities that extend beyond functional requirements.
Teaching guidance
Use life cycle analysis (LCA) to trace the environmental impact of a product from raw material extraction to end-of-life disposal. Discuss fair trade and ethical sourcing in the context of materials and food ingredients. Investigate the circular economy and how products can be designed for repair, reuse and recycling rather than disposal. Explore real examples of ethical and unethical design decisions: tobacco packaging, single-use plastics, accessibility failures. Connect to pupils' own design work by requiring ethical and environmental consideration as part of the evaluation process.
Common misconceptions
Pupils may think sustainability means using recycled materials, missing the much broader concept of reducing impact across the entire life cycle. Pupils may not see a connection between their individual design decisions and wider environmental or social outcomes; tracing specific design choices to their broader consequences makes this concrete. The apparent conflict between sustainability and cost or performance requires honest discussion of real-world trade-offs.
Difficulty levels
Aware that some products are harmful to the environment, such as plastic pollution, but cannot explain the broader concept of sustainability or the designer's role in reducing impact.
Example task
Why might a designer choose to make a product from recycled plastic instead of new plastic?
Model response: Recycled plastic uses material that already exists instead of making new plastic from oil. This means less oil needs to be extracted from the ground, and less plastic waste ends up in landfill or the ocean.
Understands that sustainability involves considering environmental impact across a product's lifecycle, and can identify ethical issues in design such as fair trade and planned obsolescence.
Example task
Explain what 'planned obsolescence' means and why it is considered an ethical problem in design.
Model response: Planned obsolescence is when a designer deliberately makes a product that will break, wear out or become outdated after a set period, forcing the consumer to buy a replacement. For example, some phone manufacturers make batteries that cannot be replaced, so when the battery degrades after two years, the whole phone must be replaced. This is ethically problematic because it wastes resources, creates electronic waste, and exploits consumers who have no choice but to buy again. It prioritises the company's profit over the customer's interests and the environment.
Applies life cycle analysis to evaluate the environmental impact of products from material extraction through to disposal, and proposes design strategies to reduce impact at each stage.
Example task
Carry out a simplified life cycle analysis of a disposable paper coffee cup. Identify the environmental impact at each stage and suggest one improvement.
Model response: Raw materials: Trees are felled for paper pulp (deforestation, habitat loss, CO2 release). The plastic lining is made from polyethylene derived from oil. Manufacturing: The pulp is processed using large quantities of water and energy; bleaching chemicals may contaminate waterways. The cup is assembled and printed. Distribution: Cups are transported from factory to coffee shops, creating transport emissions. Use: The cup is used once for approximately 15 minutes. End of life: The plastic lining makes the cup non-recyclable in standard paper recycling — it goes to landfill where it takes decades to decompose. Improvement: Replace the polyethylene lining with a plant-based PLA lining that is industrially compostable, so the cup can be composted rather than landfilled. However, this only works if composting infrastructure exists — otherwise the improvement is theoretical not practical.
Critically evaluates the circular economy model, analyses conflicting sustainability claims, and proposes design solutions that balance environmental, economic and social considerations.
Example task
A fashion company claims its clothing line is 'sustainable' because it uses organic cotton. Critically evaluate this claim using your knowledge of ethical and sustainable design.
Model response: Organic cotton addresses only one stage of the lifecycle — raw material production — by eliminating synthetic pesticides and fertilisers. However, organic cotton still requires enormous quantities of water (approximately 10,000 litres per kilogram), often grown in water-stressed regions. The claim ignores: dyeing and finishing processes, which may use toxic chemicals and consume vast amounts of water; manufacturing conditions, where garment workers may face exploitative wages and unsafe conditions; transport emissions from global supply chains; consumer use phase, where frequent washing releases microfibres; and end-of-life, where fast fashion garments are typically worn only a few times before disposal. A genuinely sustainable approach would need to address the full lifecycle: use lower-impact fibres (recycled polyester, linen, hemp); ensure fair labour conditions throughout the supply chain; design for durability and repairability rather than trend-driven obsolescence; and implement a take-back scheme for end-of-life garments. The 'organic cotton' label functions partly as greenwashing — it provides a visible sustainability signal while potentially obscuring harmful practices elsewhere in the supply chain. A circular economy approach would design clothing to be worn longer, repaired easily, and ultimately recycled into new fibre rather than discarded.
Delivery rationale
DT design process concept — structured design briefs and evaluation frameworks guide non-specialist adults.