Claim, evidence, reasoning is one of the most common structures for teaching students to argue from a text. It is simple enough for a sixth grader and flexible enough for a tenth grader. The Lion, the Witch and the Wardrobe happens to be a great practice ground for it.

The story is full of debatable questions with enough textual support on each side. Was Edmund's betrayal his own fault or the Witch's? Is Lucy the bravest of the four children? Students can pick a side, find proof, and explain why it matters.

Where students struggle is the third piece. Claims come easily, and most students can find a quote. The reasoning step, where they explain how the quote proves the claim, is the one that gets skipped.

Grading CER essays well means treating that third piece as its own skill with its own feedback.

Start with claims worth arguing

A claim like Edmund is a character in the book is not arguable. A claim like Edmund's jealousy of Peter matters more to his betrayal than the sweets do is. Spend class time turning weak claims into strong ones, because everything else depends on them.

• Claim: takes a position that a reasonable reader could disagree with
• Evidence: a quote or specific detail that directly supports the claim
• Reasoning: a sentence or two explaining how the evidence proves the point
• Connection: the link back to the larger idea, such as loyalty or temptation
• Accuracy: the evidence matches what actually happens in the book

Make reasoning visible in the rubric

Give the reasoning row as much weight as the evidence row. If both count equally, students learn that both matter. Many teachers find that doubling the weight of reasoning quickly changes the quality of the writing.

Describe each level in plain words. Level one might be that the student repeats the quote in different words, while level four is that the student explains the specific detail that proves the claim. Those descriptions make your comments easier to write and easier for students to follow.

Give feedback in the same three parts

Mirror the framework in your comments. Note whether the claim is arguable, whether the evidence fits, and whether the reasoning connects the two. Students see the structure again and start to apply it on their own.

Rubric-driven AI feedback tools handle this pattern well because each criterion gets its own comment. GraideMind can score claim, evidence, and reasoning separately and draft a note for each. You then edit for tone and add any context that only you have.

Repeat the cycle with a new question

CER improves with repetition, so plan more than one round. After the first essay, hand back feedback and give students a fresh question about the same book, such as whether the Beavers are good allies. The second attempt shows how much they absorbed.

Track each student's reasoning score across attempts. Growth on that one row is the clearest sign the framework is sinking in. It also gives you a concrete number to share when students ask how they are improving.