Rachel · SAT Reading and Writing · Reading and reasoning

Text Structure and Purpose

From what a text says to what it does

Each section moves from a short worked model to a quick check and then to a Difficult demo you work through with your teacher. First decide whether the question asks about a part, an ordered structure or the purpose of the whole. Predict before you open the choices, and explain your first answer before opening any analysis.

Class notes · September 26, 2026 · We covered Section 1 (worked model, quick check, Demo 1). The two demos from Sections 2–3 are now homework questions 16 and 17.

1. Sentence function — connect the part to the whole

Content tells you what a sentence says; function tells you what it does in this text.
Use the Three-Line Function Map: before → target → after → what changes → action + accurate target.
Useful jobs: introduce an issue; define a term; illustrate a concept; support a claim; challenge an explanation; qualify a claim; contrast views; explain a cause.
Transition words suggest a relationship; the actual claims decide it. Contrast does not automatically mean refutation.
Predict before you look: use the sentence before and the sentence after to say what the underlined part is doing, then compare that job with each choice.
A choice that repeats what the sentence says, or states a true fact from the text, is not a function. Check whether a stance belongs to the author or to someone the author only reports.

Content-to-Job Map: scope → content → relationship → action → action + target + scope.

Worked model — say the job, not the content

Read the three sentences. Say what the underlined sentence is doing for the sentences around it.

For most of the twentieth century, city planners treated street trees as decoration: pleasant, but optional. Recent measurements in one desert city, however, showed that blocks with dense tree canopy stayed several degrees cooler on summer afternoons than blocks with none. Findings like these have led some cities to reclassify trees as public-health infrastructure.

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Before: trees are optional decoration (the older view).
Target: evidence that canopy lowers street temperature.
After: cities respond by changing how trees are classified.
What changes: the older view loses authority, and a practical consequence follows.
Job (action + target): presents evidence that challenges the older view of trees and sets up the change described next.
Content-only version to avoid: “It reports a temperature difference between blocks.” True, but it names what the sentence says, not what it does.

Quick check

In one phrase, name the job of the underlined sentence (action + target). Then say what the final sentence does with it.

Some historians argue that the printing press alone made the Reformation possible. Literacy in much of Europe, however, stayed low for a century after Gutenberg. The press still mattered, these scholars concede, but largely because printed images and pamphlets read aloud reached people who could not read.

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Job: qualifies the claim that the press alone explains the Reformation by introducing a fact that complicates it.

Final sentence: resolves the tension by refining how the press mattered. The contrast word signals a limit, not a refutation: the claim survives in a narrower form.

Difficult

Demo 1 — A scene and a concept

Predict first. The underlined sentence opens the text, so there is no line before it. Ask what the next sentence does with it, then write the job as action + target before reading the choices. Drop any choice that only restates the scene.

Which choice best describes the function of the underlined sentence in the text as a whole?

In Jane Austen’s novel Mansfield Park, an almost imperceptible smile from potential suitor Henry Crawford causes the protagonist Fanny Price to blush; her embarrassment grows when she suspects that he is aware of it. This moment—in which Fanny not only infers Henry’s mental state through his gestures, but also infers that he is drawing inferences about her mental state—illustrates what literary scholar George Butte calls “deep intersubjectivity,” a technique for representing interactions between consciousnesses through which Austen’s novels derive much of their social and psychological drama.

It states a claim about Austen’s skill at representing psychological complexity that is reinforced by an example presented in the following sentence.
It advances an interpretation of an Austen protagonist who is contrasted with protagonists from other Austen novels cited in the following sentence.
It describes a recurring theme in Austen’s novels that is the focus of a literary scholar’s analysis summarized in the following sentence.
It provides a synopsis of an interaction in an Austen novel that illustrates a literary concept discussed in the following sentence.

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D. It provides a synopsis of an interaction in an Austen novel that illustrates a literary concept discussed in the following sentence.

Action + target + scope: provide a synopsis that illustrates the later concept. D matches that relationship.

Closest trap: C turns one scene into a recurring theme. A reverses which sentence is the claim and which is the example.

Explain the text relationship that decides your answer. Say your prediction before you say the letter.