How to Grade Essays with Claude 3.5 Sonnet: A Copy-Paste XML Prompt for Teachers
How to Grade Student Essays with Claude 3.5 Sonnet: A Quick XML Prompt Guide
Every teacher knows the feeling of staring at a stack of 60 essays on a Sunday afternoon. You want to give your students actual, helpful feedback, but doing it manually for every single paper takes forever and leaves you completely exhausted by the end of it.
Tools like ChatGPT often miss the mark here because they tend to rewrite the student's work or offer generic praise that doesn't help anyone. That is where Claude 3.5 Sonnet stands out. Because Claude handles large documents incredibly well and follows strict boundaries, you can train it to act like a personal assistant. It evaluates work directly against your specific rubric without taking shortcuts or rewriting the text.
This quick guide walks you through the exact setup to automate your grading routine so you can finally get your free time back.
🛠️ What You Need
- The App: A free or pro Claude.ai account
- The Rulebook: Your standard grading rubric (PDF or Word format)
- The Work: Student essays with names removed
Step 1: Prep Your Rubric
Claude needs a solid baseline to give accurate marks. Make sure your rubric explicitly lays out your scoring levels (like Needs Work, Proficient, or Excellent) along with your core categories (like Argument, Evidence, and Grammar).
Quick tip: Use the attachment button inside Claude to upload your rubric file before you paste the prompt text.
Step 2: Clean Up Student Papers
Protecting student privacy is important. Before pasting any writing into an AI tool, delete names, student roll numbers, and any other identifying details. You can copy the text directly or just drop the edited files into the chat.
Step 3: Run the Structured Prompt
Claude handles instructions beautifully when you wrap them in XML tags (the brackets that look like <this>). This simple coding trick tells the AI exactly where your rules end and where the student's work begins.
Copy the text below, drop it into Claude, and fill in the blanks.
✂️ COPY & PASTE PROMPT:
Take on the role of an experienced teacher grading essays. Evaluate the student work below strictly using the attached rubric guidelines. <instructions> 1. Review the uploaded rubric to understand the criteria. 2. Read through the student's essay carefully. 3. Assign a tier score for every category listed on the rubric. 4. Highlight one specific quote from the paper to back up your score. 5. Offer one clear, practical tip the student can use to improve their next draft. 6. Do not rewrite their sentences. Keep the focus on teaching them how to fix it themselves. </instructions> <output_format> Organize your response with clean headings for each grading category. Finish with a brief, encouraging note and the final score. </output_format> <student_submission> [PASTE STUFF HERE] </student_submission>
Claude will instantly give you a neat breakdown for each section, ready to paste right into your grading system.
⚠️ Remember: You Are Still the Boss
AI shouldn't be the final word on a student's grade. Think of Claude as a fast first-pass filter. It spots the grammar slip-ups, weak arguments, and formatting issues for you. Your job is to check its work, adjust the notes where necessary, and make the final call on the grade.
Using this setup cut down my own grading time from fifteen minutes per essay to under three. It lets you keep giving great feedback without losing your whole weekend to paperwork.
Want to simplify your workflow?
Save this post so you have the prompt handy for your next batch of assignments. If you want more practical AI tricks for everyday work, sign up for our newsletter below.