Produce clear and coherent writing in which the development, organization, and style are appropriate to task, purpose, and audience. (Grade-specific expectations for writing types are defined in standards 1-3 above.)
Common Core State Standards, Grades 9-10, Writing · Read it at the source · Checked October 14, 2026
What W.9-10.4 Means in Plain English
Ninth and tenth graders shape each piece to its job. A lab report states its result, gives the data and explains it in an impersonal style; a literary essay builds a claim through quotations; a speech is organized for listeners. The same writer sounds different in each, by design.
Eighth grade (W.8.4) uses the same wording, so the change lies in the tasks, which W.9-10.1 to 3 make harder: fair counterclaims, extended definitions, braided plot lines. Grades 11 to 12 (W.11-12.4) repeat the wording again as those tasks grow.
W.9-10.4 I Can Statements
I can choose development and organization that fit the task.
I can write in the style a discipline expects, like a lab report.
I can revise a draft when it sounds wrong for its audience.
W.9-10.4 Worked Example
The weak text is a student’s first try at her discussion section; the strong one is her rewrite after her teacher wrote: “This is a diary. Write it as a lab report.”
Prompt
Write the results and discussion section of your biology lab report. Flasks of yeast, sugar and water were capped with balloons and left for 20 minutes at three water temperatures, three trials each. Average balloon circumference: 11 cm at 10 °C, 29 cm at 35 °C and 9 cm at 60 °C; an uninflated balloon measured 9 cm. Your readers are your teacher and lab partners, who know the procedure.
Not YetSo we did the balloon lab and honestly it was really cool to watch. The warm one blew up the most and the hot one didn’t do anything, which was weird because I thought hotter would be faster. I think the yeast liked the warm water best.The facts are mostly there, but the development, organization and style fit a diary, not a lab report. There are no numbers, the result is buried in a story about the class period, “liked” stands in for an explanation, and the voice is chatty where the discipline expects precise and impersonal.
Meets the StandardBalloon circumference was greatest at 35 °C, an average of 29 cm across three trials, compared with 11 cm at 10 °C and 9 cm at 60 °C. Because an uninflated balloon measured 9 cm, the 60 °C flasks produced no measurable gas. These results suggest that fermentation, in which yeast break down sugar and release carbon dioxide, proceeds fastest near body temperature and slows sharply in cold water. The absence of gas at 60 °C is consistent with the yeast cells being killed, since high temperatures damage the enzymes fermentation depends on. One limitation is that circumference only estimates gas volume, so a future trial could collect the gas by water displacement for a more precise measure.Same data, new job. The result comes first with numbers and units, the explanation follows in the field’s terms (fermentation, carbon dioxide, enzymes), and the paragraph closes on a limitation, the order a lab report reader expects. The style is impersonal and hedged where the evidence stops: “suggest,” “consistent with.”
Moves to Use
Name the task, the purpose and the reader before drafting a sentence.Lead with the result and its numbers when the genre expects it.Explain with the discipline’s own terms, hedging where the data stops.Read the draft as the intended reader and cut whatever belongs to a different genre.
Common Mistakes with W.9-10.4
One voice for every assignment
A lab report, a literary essay and a speech that all open with a rhetorical question
Try this: Show one professional model of each genre and have students list three moves it makes that the others never do.
Organized by when it happened
“First we got the flasks, then we added sugar, then we waited…” in the discussion section
Try this: Have students write the result as the first sentence, then reorder the rest by importance to the reader, not by time.
Formal means fancy
“The yeast exhibited a most remarkable propensity for inflation.”
Try this: Teach that formal style in each discipline means precise and plain, then have students replace every inflated word with the exact term.
Rubric GeneratorFree ToolBuild a lab report rubric whose rows name the genre’s moves: result first, data with units, explanation in the field’s terms, a limitation.Lab reportGrades 9-10Style
What does the strong version put first, and why does a lab report reader want it there?
The result with its numbers: 29 cm at 35 °C against 11 cm and 9 cm. A lab report reader is looking for the finding, and the explanation means little until they have it.
Which words in the strong version show a careful, hedged style?
“Suggest” and “is consistent with.” The balloons show how much gas was made, not why, so the writer stops short of claiming more than three trials can prove.
Name two changes from the diary version that have nothing to do with the facts.
The organization moves from the order of the class period to result, explanation and limitation, and the style moves from chatty (“honestly,” “weird”) to precise and impersonal.