Lesson 4: Fixing and testing Baby Bear’s chair

When Baby Bear’s chair is complete, pupils test its strength and stability, and use their problem-solving skills to adapt their structure as necessary.

Before the lesson

Learning objectives

  • To produce a finished structure
  • To evaluate the strength, stiffness and stability of their structure

National curriculum

Pupils should be taught to:


  • Select from and use a wide range of materials and components, including construction materials, textiles and ingredients, according to their characteristics


  • 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

Success criteria

Cross-curricular links

Attention grabber

Main event


Pupils needing extra support: Could copy a design, use one material and a simple construction technique. May require support with cutting and using tape to secure joints.

Pupils working at greater depth: Should be encouraged to work independently and to use a wider range of materials and construction techniques to produce a more complex model, identifying ways to improve their design as they work.

Wrapping up

Assessing pupils' progress and understanding


Created by:
Tom Turnham,  
Design & Technology specialist
Tom has been a teacher for seven years and, as Head of Upper School at The Belham Primary School, he has a keen interest in young people and good causes. For the past seventeen years he has volunteered with various…
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