Source Square

A structured analysis tool where learners examine a source from four perspectives, each occupying one quadrant of a square: content, origin, purpose, and reliability.

Visual organisers
Source Square diagram

A source square diagram

What is source square?

  • Present a source (text, image, data, artefact)
  • Draw a square divided into four quadrants: Content, Origin, Purpose, Reliability
  • Learners complete each quadrant with their analysis
  • Use the completed square to form a judgement about the source's value and limitations

How it works

A source square provides a structured framework for evaluating sources. Each quadrant focuses on a different analytical lens. Content asks: what does this source say or show? Origin asks: who created it, when, and where? Purpose asks: why was it created and for whom? Reliability asks: can we trust it, and what are its limitations?

The structure prevents learners from treating source analysis as a single task ("Is this source useful?") and instead breaks it into distinct thinking moves. A learner might recognise that a source has rich content but was created for propaganda purposes, making it valuable for understanding attitudes but unreliable as evidence of facts.

Source squares work with any type of source: historical documents, newspaper articles, statistical data, photographs, advertisements, scientific reports, and social media posts. The four-quadrant framework applies equally to a medieval charter and a modern tweet.

The final step is synthesis. After completing all four quadrants, learners use their analysis to form an overall judgement about the source. This judgement should be nuanced: most sources are neither entirely reliable nor entirely useless. Teaching learners to articulate this nuance is central to developing critical thinking.

Classroom example

A Year 9 Humanities class in a Pembrokeshire school is analysing a World War I recruitment poster. Content: the poster shows a soldier pointing with the text "Your Country Needs You." Origin: produced by the British government in 1914. Purpose: to persuade men to volunteer for military service. Reliability: highly reliable as evidence of government propaganda techniques, but unreliable as evidence of what life in the army was actually like. Learners use this analysis to write a paragraph evaluating the poster's usefulness for understanding wartime Britain.

Curriculum for Wales connection

Source squares develop the "Develop" strand of thinking skills through structured analysis, evaluation, and critical reasoning. They build cross-curricular literacy through analytical reading and writing, and support Humanities and the Four Purposes by developing "ethical, informed citizens" who can critically evaluate information from any source.

Rainbow Curriculum's Thinking Tools lens helps you plan where source analysis tools are used across your curriculum, building critical evaluation skills that transfer far beyond history lessons.

Tips

  • Model the process with a familiar source first (e.g., a school newsletter) before moving to curriculum sources.
  • The Reliability quadrant is the hardest. Teach learners to consider both what the source is good for and what it cannot tell us.
  • A common pitfall: treating all four quadrants as equally difficult. Content is usually straightforward; purpose and reliability require deeper thinking.
  • Use source squares for modern sources too: social media posts, news articles, advertisements.
  • Combine with mysteries: learners analyse individual sources with source squares, then use their evaluations to solve the mystery.

Source: Adapted from "How to develop thinking and assessment for learning in the classroom", Welsh Assembly Government, Guidance 044/2010.