What is whole and part?

Present a whole system, structure, text, or concept Identify the individual parts that make up the whole Analyse how each part contributes to the function or meaning of the whole Consider what would happen if a part were removed or changed

Whole and Part - Systems Thinking Tool

How it works

Whole and part analysis teaches learners to see systems rather than isolated facts. Instead of studying components in isolation, learners examine how each part contributes to the functioning, meaning, or structure of the whole. This develops systems thinking, which is fundamental to understanding complex topics across all subjects.

The analysis works in two directions. Starting from the whole and breaking it into parts (analysis) reveals the structure and relationships. Starting from individual parts and building up to the whole (synthesis) reveals how components interact and depend on each other.

The most powerful question in whole and part analysis is: "What would happen if this part were removed or changed?" This thought experiment reveals how essential each part is. Removing one part might cause the whole system to fail (a critical component), while removing another might make little difference (a redundant or decorative element). This evaluation of importance develops sophisticated analytical thinking.

Whole and part works across subjects. In Science, analyse body systems, ecosystems, or machines. In Languages, analyse how paragraphs contribute to an essay's argument. In Expressive Arts, analyse how elements of a composition create an overall effect. In Humanities, analyse how different factors contribute to a historical event.

Classroom example

A Year 9 Expressive Arts class in a Cardiff school is analysing a piece of music. The teacher plays a full orchestral piece (the whole), then isolates individual parts: the melody, the bass line, the rhythm section, the harmony. Learners discuss how each part contributes. When the teacher plays the piece without the bass line, learners notice it feels "empty" and "floating." When the rhythm is removed, it feels "shapeless." They conclude that parts they barely noticed consciously are essential to the overall effect, which transforms their approach to their own compositions.

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Curriculum for Wales connection

Whole and part develops the "Develop" strand of thinking skills through analysis, evaluation, and systems thinking. It supports Science and Technology particularly well through understanding of systems, and works across all AoLEs wherever learners need to understand how components relate to create a functioning whole.

Rainbow Curriculum's Thinking Tools lens helps you plan where analytical tools are used across your curriculum, ensuring learners develop the ability to see both the big picture and the detail simultaneously.

Tips

Use physical or visual representations where possible. Taking apart a machine, removing paragraphs from an essay, or muting instruments in a recording makes the analysis concrete.
Always include the "What if?" question: "What if this part were removed?" This is where the deepest thinking happens.
A common pitfall: listing parts without analysing their contribution. The analysis of relationships is more important than the identification of components.
Start with simple systems (a bicycle, a sandwich, a sentence) before moving to complex ones (ecosystems, economies, symphonies).
Combine with fishbone diagrams to show causal relationships between parts.

Related tools

Concept Map

A diagram showing how ideas in a topic are connected, with labelled lines explaining the relationship between each pair of concepts.

Fishbone Diagram

A graphical organiser shaped like a fish skeleton where causes branch off a central spine leading to an effect, helping learners map cause-and-effect relationships.

Mind Mapping

A visual organiser where ideas branch outward from a central topic, using colour, images and keywords to map connections and generate new thinking.

Patchwork Thinking

A collaborative strategy where each learner or group contributes a piece to a larger visual display, building collective understanding by assembling individual insights into a shared whole.

Sequencing

An ordering activity where learners arrange a set of statements, events, images, or steps into a logical or chronological sequence, developing understanding of process, cause and effect, and narrative structure.