Common Mistakes and How to Avoid Them Across Both Papers

This lesson identifies the most frequent mistakes students make on AQA GCSE D&T Papers 1 and 2, explains why they cost marks, and provides strategies to avoid them. Learning from others' mistakes is one of the most efficient ways to improve your exam performance. Specification reference: AQA 8552, all sections.

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Mistake 1: Not Reading the Question Carefully

The Problem

Students see a familiar topic and start writing immediately, without checking exactly what the question is asking.

Examples

What the Question Asks	What Students Write	Why It Loses Marks
"Explain why..."	A description of the process	No reasons given — earns 0 marks for explanation
"Compare A and B"	Everything about A, then everything about B separately	Not a comparison — no linking language
"Recommend AND justify"	A recommendation with no justification	Loses half the marks
"State ONE advantage"	Three advantages in a paragraph	Wastes time; only the first is marked

How to Avoid It

1. Underline the command word before writing anything.
2. Underline key terms (material, product, process, number of marks).
3. Check the marks — the number of marks tells you how many points to make.

AQA Exam Tip: Spend 10–15 seconds reading and analysing EVERY question before writing. This small investment prevents the single biggest source of lost marks.

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Mistake 2: Using Vague or Generic Language

The Problem

Students use everyday language instead of technical terminology.

Examples

Vague Answer	Technical Answer
"The material is strong"	"The material has high tensile strength, capable of withstanding the pulling forces experienced during use"
"It is made of plastic"	"It is injection moulded from ABS (acrylonitrile butadiene styrene)"
"The finish protects it"	"A polyurethane varnish provides a hard, water-resistant surface coating that protects the timber from moisture damage"
"It looks nice"	"The product has an aesthetically pleasing minimalist form with a matt white finish and rounded edges"
"They heat the metal and shape it"	"The aluminium blank is heated to approximately 500°C and then forged using a drop hammer to form the component shape"

How to Avoid It

• Learn and use specific material names — never write "plastic," "metal" or "wood."
• Learn and use specific process names — never write "they put it in a machine."
• Learn property terminology — tensile strength, thermal conductivity, ductility, hardness, toughness, corrosion resistance.
• Practise converting vague answers into technical answers as a revision exercise.

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Mistake 3: Not Linking Answers to the Context

The Problem

On Paper 2, questions are set in a specific design context (e.g. "A company is designing a new garden tool"). Students write generic answers that could apply to any product.

Example

Question: Explain why the garden tool handle should be designed using anthropometric data.

Generic Answer (Low Marks)	Context-Specific Answer (Full Marks)
"Anthropometric data helps make products the right size for people."	"The garden tool handle diameter should be based on the grip span of the 5th percentile female hand (approximately 45 mm) to ensure it can be comfortably held by the smallest likely users. The handle length should accommodate the 95th percentile male hand (approximately 210 mm palm width) to prevent the hand from hanging off the end during use."

How to Avoid It

• Re-read the context before answering Section B questions.
• Name the product in your answer (e.g. "the garden tool handle" not "the product").
• Refer to specific users (e.g. "gardeners aged 30–70" not "the user").

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Mistake 4: Incomplete Calculation Answers

The Problem

Students write only the final number without showing the formula or working.

Example: Calculate the gear ratio for a driver gear with 12 teeth and a driven gear with 48 teeth.

Incomplete (Loses Marks)	Complete (Full Marks)
"4"	"Gear ratio = Teeth on driven gear ÷ Teeth on driver gear = 48 ÷ 12 = 4:1"

How to Avoid It

• Write the formula first.
• Substitute the values.
• Calculate the answer.
• Include units (RPM, N, W, J, kWh, Pa, mm).
• Circle or box your final answer so the examiner can find it.

AQA Exam Tip: Even if your arithmetic is wrong, you earn marks for using the correct formula and method. ALWAYS show your working.

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Mistake 5: One-Sided Evaluations

The Problem

When asked to "evaluate" or "discuss," students only present advantages (or only disadvantages), missing the balanced analysis the examiner expects.

How to Avoid It

• Structure your answer: Paragraph 1 = advantages. Paragraph 2 = disadvantages. Paragraph 3 = conclusion.
• Use connective words: "However," "On the other hand," "Conversely," "Despite this."
• Always conclude: "In conclusion," "Therefore," "Overall."

Template for a Balanced Evaluation