AI Detector Built for Teachers
Upload a student PDF. Get specific signals associated with AI-generated writing — and the language to bring them into a conversation with the student.
Scan your first paper free~10 second scans · Teacher's aid, not a verdict
The six signals Classly AI looks for
Vocabulary outside student range
Words like 'delve,' 'tapestry,' 'underscores' clustered together in writing that didn't use them before.
Structural patterns
Three-sentence paragraphs of equal length, hedged conclusions, and 'in conclusion, while…' openers.
Generic examples
Defaulting to Rosa Parks, photosynthesis, WWII instead of the specific text or lab you covered this week.
Missing in-class references
No mention of Tuesday's discussion, Wednesday's annotation, or the document you read together.
Process trail mismatch
Drafts and brainstorms that don't connect to the final product.
Voice mismatch
You know how this student writes. The scanner corroborates — your judgment leads.
The better fix is upstream
Detectors are a band-aid. Designing assignments students can't shortcut with AI is the real move.
See AI-resistant homework →