Grade examination
scripts withAI precision
Upload handwritten theory scripts, and let our SBERT-powered engine analyze, score, and explain every mark — so you review with confidence, not fatigue.
Piloted across leading Nigerian institutions
Everything you need to
grade with intelligence
Five powerful capabilities working together to transform how Nigerian universities assess theory examinations.
OCR Script Processing
Advanced optical character recognition trained on Nigerian handwriting styles. Handles cursive, print, and mixed scripts across English examination papers.
Rubric-Based Grading
Define your marking scheme once. TheoGrader maps every answer to your rubric criteria automatically.
Semantic Similarity
Powered by SBERT, we compare meaning — not just keywords. Students get credit for correct concepts expressed differently.
Confidence & Explainability
Every score comes with a confidence rating and detailed explanation of why marks were awarded or deducted.
Lecturer Review & Override
You're always in control. Accept, adjust, or override any AI-generated score with full audit trail.
From script to score
in five simple steps
A streamlined workflow designed for the way Nigerian lecturers actually work.
Upload Scripts
Scan or photograph exam scripts. Upload individually or in bulk — we accept PDF, PNG, JPG.
OCR Extraction
Our engine reads each student's handwriting, extracting text answer-by-answer with region detection.
SBERT Analysis
Sentence-BERT compares each answer semantically against your model answers and rubric criteria.
Intelligent Scoring
Scores are generated per question with concept matches, confidence levels, and detailed breakdowns.
Review & Finalize
Review each graded script, override where needed, add comments, and export final results.
See the grading
engine in action
A detailed breakdown of how TheoGrader scores and explains every answer.
Question 3: ATP Synthesis
"Describe the process of ATP synthesis in the mitochondria, including the role of the electron transport chain."
Grading Breakdown
What lecturers are saying
"I used to spend 3 weeks grading 200 scripts for BIO 301. With TheoGrader, I reviewed everything in 2 days. The semantic analysis is shockingly accurate."
"The confidence scores give me peace of mind. I know exactly which scripts need my close attention and which ones the AI handled perfectly. This is the future."
"The override feature is crucial. I'm not handing control to AI — I'm using AI to amplify my expertise. The rubric mapping is beautifully done."
Common questions
Our OCR model has been specifically fine-tuned on thousands of Nigerian examination scripts, covering various handwriting styles. We achieve 92%+ character accuracy, and uncertain readings are flagged for review.
Absolutely. You define your own marking scheme, model answers, and grading criteria for each question. TheoGrader adapts to your rubric — not the other way around.
SBERT (Sentence-BERT) is a state-of-the-art language model that understands meaning, not just keywords. If a student explains a concept correctly using different words, they still get credit.
Yes — every score can be accepted, adjusted, or completely overridden. All changes are logged in an audit trail. You are always the final authority.
All data is encrypted at rest and in transit. We comply with NDPR. Your data is never shared with third parties. Each lecturer has their own isolated account.
TheoGrader is currently in early access. Each lecturer gets one free account with full feature access. Sign up now to lock in early adopter benefits.
Ready to transform how you grade?
Join 200+ Nigerian lecturers who are grading smarter, faster, and more consistently with TheoGrader.
One account per lecturer • No credit card required • Full feature access