Evaluative Writing — Moving Beyond Description

If there is one skill that separates A/A* students from B students at A-Level, it is the ability to write evaluatively. Every subject, every exam board, and every mark scheme rewards evaluation in the top bands. Yet most students find it difficult — not because they lack knowledge, but because they have not been taught how to convert knowledge into critical assessment.

This lesson teaches you exactly what evaluation looks like, how to produce it, and how to weave it into every paragraph.

What Evaluation Actually Means

Evaluation is the process of making judgements about the value, validity, significance, or effectiveness of something based on evidence and reasoning.

It is NOT:

Listing advantages and disadvantages (that is description of strengths/weaknesses)
Saying "this is important" (that is assertion)
Presenting "both sides" without comment (that is balanced description)

It IS:

Explaining WHY something is a strength or weakness
Assessing HOW significant a factor is compared to others
Judging WHETHER evidence supports or undermines a claim
Determining UNDER WHAT CONDITIONS something applies or fails

Not Evaluation	Evaluation
"A strength of this study is that it was a lab experiment."	"The laboratory setting increased internal validity by controlling extraneous variables, but this comes at the cost of ecological validity — the artificial conditions may not reflect how participants behave in real-world situations, limiting the generalisability of the findings."
"There are arguments for and against free trade."	"While the theoretical case for free trade is compelling — as demonstrated by Ricardo's comparative advantage model — the assumption of perfect factor mobility rarely holds in practice. Workers displaced by cheap imports cannot instantly retrain, which means the short-run social costs of trade liberalisation may outweigh the long-run efficiency gains, particularly in economies with weak social safety nets."

Not Evaluation

Evaluation

"A strength of this study is that it was a lab experiment."

"The laboratory setting increased internal validity by controlling extraneous variables, but this comes at the cost of ecological validity — the artificial conditions may not reflect how participants behave in real-world situations, limiting the generalisability of the findings."

"There are arguments for and against free trade."

"While the theoretical case for free trade is compelling — as demonstrated by Ricardo's comparative advantage model — the assumption of perfect factor mobility rarely holds in practice. Workers displaced by cheap imports cannot instantly retrain, which means the short-run social costs of trade liberalisation may outweigh the long-run efficiency gains, particularly in economies with weak social safety nets."

The Evaluation Toolkit

Here are specific evaluative moves you can use across all A-Level subjects:

1. Assessing the Strength of Evidence

flowchart LR
    A[Present the evidence] --> B[Assess its quality]
    B --> C{Is it strong<br/>or weak?}
    C -->|Strong| D[Explain WHY:<br/>methodology, sample, replication]
    C -->|Weak| E[Explain WHY:<br/>bias, small sample, lack of replication]
    D --> F[Implication for<br/>the argument]
    E --> F

Example (Psychology): "Milgram's (1963) obedience study used a sample of 40 American males, which limits generalisability to other cultures and genders. However, the study has been replicated across multiple cultures — including Burger's 2009 partial replication — with broadly similar results, suggesting the core finding of situational obedience is robust despite the original sample limitations."

2. Identifying Assumptions and Limitations

Every theory, model, or policy rests on assumptions. Evaluative writing identifies these assumptions and questions whether they hold:

Example (Economics): "The Keynesian multiplier model assumes that injected spending circulates within the domestic economy, but in an open economy with a high marginal propensity to import — such as the UK — a significant proportion leaks out as spending on foreign goods, reducing the multiplier effect substantially."

3. Comparing and Contrasting Perspectives

Example (Sociology): "While functionalists view education as a meritocratic institution that allocates individuals to roles based on ability, Marxists counter that educational attainment is primarily determined by social class, with the hidden curriculum reproducing the values and attitudes that serve capitalist interests. The persistence of a strong correlation between parental income and educational attainment in OECD data lends more support to the Marxist critique than to the functionalist claim of meritocracy."

4. Assessing Significance and Importance

Example (History): "While the assassination of Archduke Franz Ferdinand was the immediate trigger for the outbreak of war in 1914, it was arguably less significant than the underlying system of alliances and the arms race, which had created a European powder keg that any spark could have ignited. The assassination was sufficient but not necessary — some other crisis would likely have produced the same result within months or years."

5. Considering Real-World Application

Example (Biology): "Although CRISPR-Cas9 gene editing has demonstrated remarkable precision in laboratory settings, its therapeutic application raises concerns about off-target effects — unintended edits to non-target genes. The 2018 case of He Jiankui, who used CRISPR to edit human embryos, illustrated that the technology has outpaced the ethical and regulatory frameworks needed to govern its use."