AP® English Language and Composition review sheet from Aim for Five (aimforfive.com/lang/units/3/3-4)
Unit 3 · Topic 3.4
3.4 Building your own line of reasoning
Your own essays need a line of reasoning: claims arranged in an order that builds toward your thesis, with each body paragraph doing one clear job. When the parts connect, the essay reads as one argument instead of a list of separate points.
Key terms
- line of reasoning
- topic sentence
- body paragraph
- sequence
A chain, not a pile
A pile of reasons is a list: here's one, here's another, here's a third. A chain is an argument: this reason matters, and because of it, this next point follows, which leads to my conclusion. Readers are more convinced by a chain, and Row B of the rubric names a line of reasoning as part of the top scores.
Give each paragraph one job
Before writing, decide what each body paragraph will prove. One job per paragraph keeps your reasoning visible. Then choose an order that fits your argument.
- Least to most important: end on your strongest point so it stays with the reader.
- Simple to complex: start with what readers will accept easily, then build.
- Problem, cause, solution: useful for policy arguments.
- Beginning, middle, end of the passage: often the clearest order for rhetorical analysis, because the writer's choices change as the text develops.
- Objection last: answer the strongest counterargument after you've built your case, or first if the audience already believes it.
Topic sentences carry the line
A good test: read only your thesis and your topic sentences. Do they make sense as a short version of your argument? If a topic sentence is just evidence ("In Source C, a survey found...") or a device ("Paine uses a simile"), the reader can't see the line. Make each topic sentence a claim that connects to the thesis.
Commentary all the way through
The rubric's top Row B score asks you to consistently explain how evidence supports your line of reasoning. That means commentary in every paragraph, plus links between paragraphs. A sentence at the end of a paragraph that looks ahead ("But cost is only part of the problem") or one at the start that looks back ("Even if fines were affordable, they would still...") helps readers follow the chain.
Planning in a few minutes
- Read the prompt twice and underline the task (argue, analyze, take a position).
- Write a one-sentence thesis that answers it.
- Jot two or three claims that support the thesis, in the order that builds best.
- Under each claim, note the evidence you'll use: a source letter, a quotation, an example.
- Before writing, check that each claim does a different job and leads to the next.
Worked examples
Try each one yourself first, then open the solution.
- Example 1
Turning a list into a line of reasoning
Practice prompt (written for this page): "Should high schools require community service to graduate?" A student's plan reads: Thesis: "Schools should require community service." Paragraph 1: it looks good on college applications. Paragraph 2: it helps the community. Paragraph 3: students learn things. Revise the plan into a line of reasoning.
Show the solutionHide the solution
- Step 1: Diagnose: three loosely related reasons, with no order and no connection between them. The thesis gives no reason.
- Step 2: Choose a controlling idea that ties the reasons together: required service teaches students about their community in ways classrooms can't.
- Step 3: Order the paragraphs so each builds on the last: what students learn, why it has to be required to reach everyone, then what the community gains, and finally an answer to the strongest objection.
- Step 4: Write topic sentences that are claims, with transitions that show how they connect.
Answer: Revised plan. Thesis: "High schools should require a modest amount of community service, because it teaches students about their own communities in ways classrooms can't, and only a requirement reaches the students who would never sign up on their own." P1: Service puts students in contact with people and problems they would not otherwise meet. P2: Because the students who would gain the most are often the least likely to volunteer, the experience has to be required to reach them. P3: As a result, communities gain a steady supply of help and future adult volunteers. P4: Critics argue that forced service isn't real service; even so, many habits that start as requirements, from reading to exercise, become choices later. Each paragraph depends on the one before it, so the plan reads as one argument.
Common mistakes
- Writing three unrelated reasons with no explanation of how they connect.
- Topic sentences that are evidence or plot summary instead of claims.
- Two paragraphs that make the same point with different examples.
- In Question 2, organizing by device ("First, ethos... Second, pathos..."). It can work, but it often turns into a list. Following the passage's order or the writer's purpose usually shows the reasoning more clearly.
On the exam
- Spend a few minutes planning each essay. A quick outline with a thesis and one claim per paragraph is the simplest way to build a line of reasoning under time pressure.
- Readers notice when an essay builds. Paragraphs that each move the argument forward support the higher Row B scores.
Connected topics
Videos
Check yourself
5 questions on 3.4 Building your own line of reasoning. Pick an answer to see if you got it, and why.
Written for this practice set: two body paragraphs from a student's draft of a rhetorical analysis essay on Abraham Lincoln's Second Inaugural Address (1865).
The writer wants to begin sentence 5 with a phrase that shows how paragraph 2 builds on paragraph 1. Which choice is most effective?
Which thesis statement would best fit the line of reasoning in these two paragraphs?
Written for this practice set: a student's draft of two paragraphs from a synthesis essay. Source A is a town water report, Source B is a magazine article and Source C is a letter from a homeowners' association; all are invented.
Which sentence would best replace sentence 1 as a topic sentence that states a claim the paragraph's evidence supports?
Written for this practice set: a student's draft of an argument for the school newspaper. Brookfield and its school are invented.
Sentence 10 begins with "Most important." Why does paragraph 4 work well as the final body paragraph?
The writer wants to add a topic sentence at the beginning of paragraph 3 that connects it to the line of reasoning. Which choice best accomplishes this goal?
0 of 5 answered