Write arguments to support claims with clear reasons and relevant evidence
Common Core State Standards, Grade 8, Writing · Read it at the source · Checked October 14, 2026
What W.8.1 Means in Plain English
Eighth graders state a claim, name the strongest opposing claim and show exactly where theirs parts ways with it. Each reason carries evidence from a credible source, phrases like even so tie claim, counterclaim and evidence together, the voice stays formal, and the conclusion grows out of the argument.
Seventh grade (W.7.1) asks students to acknowledge opposing claims, and a polite nod is enough. Eighth grade wants the difference spelled out: why the other side’s point does not settle the question, with counterclaims tied to reasons by clear transitions. Grades 9 to 10 (W.9-10.1) develop both sides fairly.
W.8.1 I Can Statements
I can state my claim and distinguish it from the opposing claim.
I can back each reason with credible evidence, in a formal style.
I can use transitions to tie counterclaims to reasons and conclude my argument.
W.8.1 Worked Example
Both students had the same source packet and the same opposing op-ed; only one of them took the other side seriously.
Prompt
Should our school mark homework complete or incomplete instead of giving it a letter grade? Write an argument that takes a side and answers the strongest opposing claim. From the source packet: in our 8th-grade survey, 71 percent of students said they copy graded homework at least once a month; when Mr. Ortiz’s science classes switched to complete/incomplete marks last spring, homework turn-in stayed at 88 percent, the same as the semester before; and a parent op-ed in the school newsletter argues that students will stop trying if homework does not count.
Not YetHomework should not be graded because it is stressful and lots of kids copy it anyway. Some people think kids won’t do it if it isn’t graded, but they are wrong. That’s why we should stop grading homework.The claim is there and the other side gets a mention, but “they are wrong” dismisses the counterclaim instead of distinguishing the claim from it. “Lots of kids” stands in for the survey, the contractions slip out of formal style, and the last sentence only repeats the first.
Meets the StandardOur school should mark homework complete or incomplete instead of giving it a letter grade. Some parents argue that students will stop trying once homework no longer counts, and that concern deserves a serious answer. The evidence, however, points the other way: when Mr. Ortiz’s science classes switched last spring, homework turn-in stayed at 88 percent. The opposing claim assumes the grade is what makes students work, but our survey suggests the grade is what makes them copy, since 71 percent of 8th graders admit to copying graded homework at least once a month. Removing the letter grade would therefore take away the reason to copy while keeping the reason to practice. Complete/incomplete marks would make homework an honest record of what students can actually do.The claim comes first, then the opposing claim in its fairest form. The writer then does what 8th grade adds: names the assumption behind the counterclaim and shows where the two claims part ways. Each reason carries a fact from the packet, however and therefore mark the turns, the voice stays formal, and the conclusion follows from the evidence.
Moves to Use
State the claim in one sentence before mentioning the other side.Put the opposing claim in its strongest fair form, then name the assumption it rests on.Answer the counterclaim with evidence, never with “they are wrong.”Mark each turn with a transition such as however, but or therefore.End with a sentence that follows from the evidence, in the same formal voice.
Common Mistakes with W.8.1
The straw-man counterclaim
“Some people think homework should be graded, but they just like giving out grades.”
Try this: Have students write the opposing claim so that someone who holds it would agree it is fair, before they write a single rebuttal sentence.
Acknowledging without distinguishing
“Some people disagree, and they have a point. But I still think we should switch.”
Try this: Add the sentence frame “That argument assumes…, but…” and require one piece of evidence after the but.
Slipping out of formal style
“Honestly, grading homework is kind of pointless and everybody knows it.”
Try this: Highlight every you, everybody, honestly and contraction in the draft, then rewrite those sentences in third person with a specific source.
What opposing claim does the strong response name, and how does it distinguish its own claim from it?
That students will stop trying once homework no longer counts. The writer points out that this claim assumes grades make students work, while the survey suggests grades make them copy.
Which two facts from the source packet does the strong response use?
The 88 percent turn-in rate in Mr. Ortiz’s classes after the switch, and the 71 percent of 8th graders who admit copying graded homework at least once a month.
Why does “they are wrong” fall short of W.8.1a?
It acknowledges the other side but never distinguishes the claim from it. No reason or evidence explains why the opposing claim does not hold.