Lesson 4: Testing and evaluating

After adding the finishing touches to their windmills, children test their structures to check that they would make a suitable home for the mouse.

Before the lesson

Learning objective

  • To evaluate my project and adapt my design

National curriculum


  • Explore and evaluate a range of existing products
  • Evaluate their ideas and products against design criteria

Technical knowledge

  • Build structures, exploring how they can be made stronger, stiffer and more stable
  • Explore and use mechanisms [for example, levers, sliders, wheels and axles] in their products

Success criteria

Cross-curricular links

Attention grabber

Main event


Pupils needing extra support: Could work as part of a guided group, testing each point in the success criteria in the same way.

Pupils working at greater depth: Should independently adapt their windmill according to what they have found through testing.   Should use appropriate vocabulary to describe the components.

Wrapping up

Assessing pupils' progress and understanding


Created by:
Vicki Risianova,  
Design & Technology specialist
After 4 years of being a TV and radio presenter, Vicki headed to the secondary classroom where she spent 12 years teaching Design and Technology as well as PE. Working as a subject leader, she ran D&T tournaments and weekly…
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