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Lesson details

Learning outcome

I can evaluate design ideas against design requirements and justify my choice.

Key learning points

  1. Feedback can be used to steer design thinking.
  2. Design decisions need to be justified with evidence.
  3. Evaluation enables justified design decisions for iterative development.
  4. Design decisions can combine positive ideas.
  5. There are lots of methods for communicating feedback/evaluation.

Keywords

  • Design decision - a deliberate choice to meet a requirement or solve a problem

  • Design requirements - something which is needed or wanted to make a product successful

  • Justification - why something is done, or believed to be right

  • Iterative - refining and improving

  • Evaluation - checking how good something is and how to make it better

Common misconception

The most aesthetically-pleasing idea is the best.

Strong design choices balance creativity with inclusivity, feasibility, and impact - aesthetics alone aren’t enough.

Teacher tip

When modelling evaluation, deliberately show how an exciting but impractical idea can fall short compared to a less glamorous but more inclusive option.

Licence

This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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Prior knowledge starter quiz

6 Questions

Q1.
What is a design decision?

a random idea that happens during development
Correct answer: a deliberate choice to meet a requirement or solve a problem
a mistake made during testing
a drawing used to present a product

Q2.
A __________ is something that is needed or wanted to make a product successful.

prototype
specification
user test
Correct answer: design requirement

Q3.
Match each keyword to its meaning.

Correct Answer:justification,explaining why something is done or believed to be right

explaining why something is done or believed to be right

Correct Answer:evaluation,checking how good something is and how to make it better

checking how good something is and how to make it better

Correct Answer:iterative,refining and improving based on feedback

refining and improving based on feedback

Q4.
Why is evaluation important in design?

it saves time by avoiding user feedback
it allows designers to skip testing
Correct answer: it helps identify what works well and what needs improving
it replaces the need for prototypes

Q5.
When designers make improvements over time using feedback, the process is called .

Correct Answer: iterative, iteration

Q6.
Which of these shows that feedback can steer design thinking?

ignoring user comments
Correct answer: making changes based on user testing
avoiding evaluations to save time
sticking with the first idea only

6 Questions

Q1.
Why should designers justify their design decisions?

to impress clients with technical words
to guess which ideas might work best
Correct answer: to explain choices using evidence and reasoning
to avoid user testing

Q2.
Checking how good something is and finding ways to make it better is called .

Correct Answer: evaluation, evaluating

Q3.
Match each design activity to its purpose.

Correct Answer:gathering user opinions,using feedback to improve ideas

using feedback to improve ideas

Correct Answer:evaluating ideas,assessing strengths and weaknesses of a design

assessing strengths and weaknesses of a design

Correct Answer:justifying decisions,using evidence to explain design choices

using evidence to explain design choices

Q4.
A design choice supported by testing and reasoning has strong __________.

feedback
proportion
structure
Correct answer: justification

Q5.
Why does playing or repeating a design activity not automatically improve it?

Correct answer: because repetition alone doesn’t include reflection or change
because designers shouldn’t repeat anything
because testing is unnecessary
because feedback is only needed at the end

Q6.
What should designers do after evaluating their ideas?

Correct answer: make changes to improve and justify those changes
ignore the results
restart the design process completely
finish without any adjustments

To help you plan your 10 design and technology lesson on: Idea evaluation and selection, download all teaching resources for free and adapt to suit your pupils' needs...