I am excited to assign more writing now that I can give them specific and objective feedback more quickly. I may even postpone my retirement because of your product!
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Pick a rubric from our library, or let CoGrader detect the right one from the essay.
50,000+ Teachers trust CoGrader
1,000+ Schools across all 50 states
2M+ Essays graded with AI
80% Less time grading
Used at 1000+ schools
Everything you need to grade a stack of papers
Grade against any rubric
Score papers against official AP and state rubrics, upload the rubric you already use, or build one from your assignment prompt. Every point maps to a criterion.
Import a whole class from your LMS
Pull an assignment and its submissions straight from Google Classroom, Canvas, or Schoology, or upload PDFs and Word docs.
Feedback students can act on
Each paper comes back with a rubric-aligned score and specific comments tied to the student's own writing, ready for you to edit.
Grades and class reports
See how the whole class did, then export grades and feedback to your gradebook. You sign off before anything reaches students.
The workflow
Grade a full class in four steps
Import a full class, grade every paper against your rubric, and send scores back to your LMS, all in one pass.
- Step 1
Import or paste the papers
Connect Google Classroom, Canvas, or Schoology and CoGrader pulls the assignment and your roster. Working from PDFs or Word docs? Upload them directly.
- Step 2
Pick your rubric
Use an official AP or state rubric, upload the one you already use, or build one from your assignment prompt.
- Step 3
CoGrader drafts the grades
The AI scores each paper criterion by criterion and writes rubric-aligned feedback for every student. Most class sets finish in a few minutes.
- Step 4
You review
Adjust any score, rewrite any comment, then export grades back to your LMS. Nothing goes to students without your approval.
Score every paper by your own criteria
CoGrader grades against the same rubrics your assessments already use, so the score maps to the criteria your students are taught. Pick an official College Board AP rubric, a state rubric like STAAR or the New York rating guides, or upload your own.
Official AP
- Examples:
- AP Lang, AP Lit, AP History DBQ and LEQ, AP Research
- How it scores:
- College Board rubric components, scored point by point
State writing tests
- Examples:
- Texas STAAR, California CAASPP, Florida B.E.S.T., New York Regents
- How it scores:
- Aligned to the state rating guide
Common Core and standards
- Examples:
- Argumentative, informative, and narrative writing
- How it scores:
- Scored against the grade-level criteria
Your department rubric
- Examples:
- Upload the rubric your team already uses
- How it scores:
- Scored against your exact criteria and levels
Built from your prompt
- Examples:
- Paste an assignment and CoGrader drafts a rubric
- How it scores:
- Editable before you grade
Why teachers grade papers with CoGrader
Rubric-aligned feedback students can act on
Every score ties to a criterion, with the reasoning attached.
You keep the final say
Review, adjust, and approve every grade before you post it.
Consistent across the whole stack
The same rubric is applied to every paper, comparable to two trained human readers.
Works with your LMS
Import papers and export grades without leaving your gradebook: Google Classroom, Canvas, and Schoology, plus DMAC, Brightspace, and Blackboard.
Trusted by teachers nationwide
Teachers who grade for a living use CoGrader to score papers against a real rubric and give every student feedback they can act on.
I am absolutely blown away by CoGrader. It has been excellent for pre-scoring essays and providing students with comprehensive, usable feedback.
What usually takes me days (and way too many hours of off-contract time), took me mere hours. I plan on hosting a PD for my staff in the next few weeks.
Co-workers, students and I have compared results from CoGrader with a variety of other AI scoring for AP essays, and yours is BY FAR the most accurate.
Helping teachers GRADE but more importantly helping GIVE QUALITY FEEDBACK, and putting the power of great feedback into the hands of kids so they have AGENCY to improve.
Teachers will be motivated to assign more writing. It allows teachers to personalize student feedback quickly, leaving more time for targeted instruction.
I almost cried when I used it. It was as if someone handed me my weekends back on a silver platter.
THANKS. CoGrader is BY FAR the most accurate AI scoring for AP essays I have used, with the best feedback.
I am excited to assign more writing now that I can give them specific and objective feedback more quickly. I may even postpone my retirement because of your product!
I am absolutely blown away by CoGrader. It has been excellent for pre-scoring essays and providing students with comprehensive, usable feedback.
What usually takes me days (and way too many hours of off-contract time), took me mere hours. I plan on hosting a PD for my staff in the next few weeks.
Co-workers, students and I have compared results from CoGrader with a variety of other AI scoring for AP essays, and yours is BY FAR the most accurate.
Helping teachers GRADE but more importantly helping GIVE QUALITY FEEDBACK, and putting the power of great feedback into the hands of kids so they have AGENCY to improve.
Teachers will be motivated to assign more writing. It allows teachers to personalize student feedback quickly, leaving more time for targeted instruction.
I almost cried when I used it. It was as if someone handed me my weekends back on a silver platter.
THANKS. CoGrader is BY FAR the most accurate AI scoring for AP essays I have used, with the best feedback.
More ways to grade with CoGrader
STAAR Essay Grader
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Grade STAAR essaysAP History DBQ Grader
Score AP History DBQs on the official College Board 7-point rubric.
Score a DBQAP Research & FRQ Grader
Score AP research and free-response work on the official College Board rubrics.
Score AP workWant to see what Education looks like in 2026?
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Frequently Asked Questions
Paper grading, answered.
What is a paper grader?
A paper grader is an online tool that scores a written paper and returns feedback on its argument, structure, and writing. The best paper graders score against a rubric, so the grade reflects the criteria you set, and the teacher approves it before students see it.
How accurate is an AI paper grader?
Reliable enough to trust as a first pass, not to publish unread. Independent testing by The Hechinger Report found CoGrader agreed with human scores on 89% of 943 essays, and its scoring is comparable to two trained human readers. You review and adjust before any grade is final.
Does it grade against a rubric? Can I use my own?
Yes to both. CoGrader scores each paper criterion by criterion against the rubric you choose, and you can pick an official AP or state rubric, upload your own, or build one from your assignment prompt.
Can I grade a whole class of papers at once?
Yes. Import a full class from your LMS or upload the files, and CoGrader grades every paper against your rubric in one pass. Most class sets finish in a few minutes.
Does it connect to Google Classroom, Canvas, or Schoology?
Yes. CoGrader imports papers and exports grades with Google Classroom on every plan, and Canvas, Schoology, DMAC, Brightspace, and Blackboard on paid plans.
Can it grade research papers or AP research papers?
Yes. CoGrader grades research and AP Research papers against the official AP Research rubric or one you provide, scoring thesis, sources, method, and argument separately.
Is a paper grader free? How many papers can I grade for free?
Free for up to 100 papers a month. The free plan includes the rubric builder, Google Classroom import, and teacher review, with paid plans for more papers and more integrations.
Is student work kept private?
Yes. CoGrader is FERPA compliant, student work is anonymized before our AI providers process it, and provider agreements prohibit using student data to train their models.
Who is responsible for the final grade?
The teacher. CoGrader drafts a first-pass score, and the teacher reviews, adjusts, and approves it before publishing. The final grade is your professional judgment, supported by AI, never replaced by it.
Can students check their own paper with it?
Yes, on a separate tool built for them. Send students the free, no-signup student essay grader for instant rubric-based feedback on their own draft.
Can it detect AI-written papers?
Yes, as an advisory flag, not proof. CoGrader's AI writing checker surfaces the evidence behind each flag so you can decide how to handle it, and no detector is perfectly accurate.
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