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  2. Computing > Lower key stage 2 > ARCHIVED Year 4: Programming 2: Computational thinking > Lesson 2: Decomposition
Bell

This lesson is archived.

Learning objective

  • To understand what decomposition is and how to apply it to solve problems.

Success criteria

  • I can decompose a problem.
  • I can use decomposition
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National curriculum

Computing

Pupils should be taught to:

  • Design,
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Cross-curricular links

Physical Education

Pupils should be taught

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Before the lesson

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Lesson plan

Recap and recall

Display the Presentation: Brain dump and hand out whiteboards and pens (one each).

Learning objective

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Adaptive teaching

Pupils needing extra support

Should identify two key features of the game and think about how to code them.

Pupils working at greater depth

Should think about extra features they could add to their game and how they might code them (e.g. adding further obstacles for the bug to bump into or making their bug bigger or smaller); could write a step-by-step explanation of how to decompose a piece of code.

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Assessing progress and understanding

Pupils with secure understanding indicated by: understanding what the different code blocks

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Vocabulary definitions

  • abstraction

    Identifying the important detail and ignoring irrelevant information.

  • algorithm design

    Creating a formula or set of instructions to solve the problem.

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In this unit

Assessment - Computing Y4: Computational thinking

Lesson 1: What is computational thinking?

Lesson 2: Decomposition

Lesson 3: Abstraction and pattern recognition

Lesson 4: Algorithm design

Lesson 5: Applying computational thinking

Originally created by:

Kapow Primary team

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Maintained by: Kapow Primary team

Last update: 27th March, 2026

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Lesson 1: What is computational thinking? Previous Lesson
Lesson 3: Abstraction and pattern recognition Next Lesson

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