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Case Study • EdTech AI

Slashing Grading Turnaround by 95% at TestnTrack with Dual AI Engines

EdTech & Digital Assessment
AI Consultancy + Development
June 2024
Speed
95%
Faster Grading
Accuracy
98.5%
Grading Accuracy
AI Grading Platform
OCR/OMR Engine
Subjective Engine
Grading Progress4h Complete
1000 papers (was 72h)
Cost: ₹3/sheetAccuracy: 98.5%Teacher Time: 10h
Dual AI Engines
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Executive Snapshot

Educational Assessment Revolution

Client
TestnTrack – Jaipur-based assessment platform for K-12 schools & coaching institutes
Challenge
Manual teacher network caused 3-day delays & rising grading costs
Services
AI ConsultancyAI DevelopmentAI Agents
Key Results
95% faster results
₹10L/mo OPEX cut
98.5% accuracy
85% cost reduction
“AI-grading let our teachers focus on teaching, not tallying bubbles.”
VS
Vinay Sharma

Co-Founder, TestnTrack

Challenge & Objectives

Challenge Narrative

TestnTrack relied on hundreds of part-time teachers who manually tallied OMR bubbles, read every handwritten answer, and entered marks. A single mid-term (10,000 papers) still took 3 days to publish results, chewing through overtime budgets and frustrating parents who wanted instant feedback. Scaling to new districts meant hiring more graders, not better tech.

Objectives (Baseline → Target)

Result turnaround
72 h → ≤ 4 h
95% faster
Grading cost / sheet
₹ 20 → ₹ 3
85% reduction
Teacher hrs / 1,000 papers
100 h → 10 h
90% reduction
Accuracy vs. audit
93% → ≥ 98%
5.5 pts increase
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Solution Overview

Hybrid AI Assessment Engine

Service Pillars Engaged

AI Consultancy
3-week audit & SOP blueprint
AI Development
Hybrid AI Assessment Engine

Dual AI Engines

1. OCR/OMR Engine

Vision model detects sheet layout, classifies filled bubbles, returns JSON map with 99% accuracy—no dedicated scanners required.

2. Subjective-Answer Engine

Vision-transformer + LLM layer extracts handwriting, decomposes model answer into key-points, awards marks for matches, and spot-scores extra insights.

Assessment Dashboard

Class Performance
75%
Weekly Progress
Recent Exams
Math Unit Test
98.5%
Science Quiz
98.5%
History Assessment
98.5%
Real-time Analytics
4h
Turnaround
₹3
Cost/Sheet
Live Results
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Architecture & Approach

Implementation Strategy

1Technical Build

Input ingestion: React-Native app + offline queue
OCR core: PyTorch + Detectron2, quantised for on-device
Subjective scorer: Vision + LLM + custom attention head
Orchestration: AWS Fargate micro-services, Step Functions
Security: VPC isolation, AES-256 at rest, logs to ELK

2Discovery & SOP Design

15 stakeholder interviews, 12 classroom shadow-sessions
22 manual steps → consolidated into 6 automated stages

3Deployment & Adoption

Pilot (2 schools, 8 teachers) → phased rollout (45 schools) in 7 weeks
On-site workshops; feedback loop auto-tags mismarked answers for model retrain

Model Improvement Flow

Teacher Side
Teacher Smartphone App
Scan Answer Sheets\\nPhotos / PDFs
OCR / OMR Engine
Subjective Answer Engine
Grading Orchestrator API
Human Audit / Review
Mis-graded Cases
Feedback Loop & Retraining
Analytics Dashboard
Student & Parent Portal
On-Device AI

Outcomes & Business Impact

MetricPre-AIPost-AIΔ
Result turnaround72 h4 h▲ 95% faster
Grading cost / sheet₹ 20₹ 3▼ 85%
Teacher hrs / 1,000 papers100 h10 h▼ 90%
Monthly OPEX₹ 12 L₹ 1.8 L▼ ₹ 10.2 L
Accuracy vs. audit93%98.50%▲ 5.5 pts
3-yr projected ROI640%
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