Edexia

What It Does

Edexia is an AI-powered essay grading and feedback platform purpose-built for secondary English teachers working within Australian (VCE, HSC, QCE, WACE) and International Baccalaureate (IB) curricula. It automates the time-intensive process of marking student essays while maintaining teacher control, rubric alignment, and data privacy. Teachers can review, edit, or build on every AI-generated comment before releasing feedback to students, ensuring pedagogical intent is preserved.

Who It's For & The Problem It Solves

Designed by and for English teachers, Edexia addresses the burnout and bottleneck of essay marking. Teachers spend hours providing detailed, personalised feedback on every submission—time that could be redirected to lesson planning, student conferences, or professional development. Edexia acts as an AI scribe, drafting rubric-aligned feedback that teachers then refine and personalise. Students receive faster, more consistent feedback, enabling rapid iteration and improvement within a single assignment cycle.

Key Features & Capabilities

• Curriculum-Aligned Grading: Pre-loaded with IB, VCE, HSC, QCE, and WACE rubrics, grade descriptors, and text-specific knowledge bases covering major works like Things Fall Apart, The Handmaid's Tale, and Beloved
• Teacher Review Mode: Nothing reaches students until reviewed and released; all AI comments are editable or deletable
• Voice Notes: Record personal audio feedback on any comment to add warmth and nuance
• AI Detection & Writing Replay: Watch keystroke-by-keystroke replays of student writing, detect pastes, tab switches, and flag likely AI-generated content with low false-positive rates
• Benchmarking & Calibration: Teachers blind-grade identical scripts, meet to align standards, then receive visualisations and AI-driven insights on marking tendencies and consistency
• Cross-Submission Reports: AI-generated summaries of each student's strengths, weaknesses, and progress across multiple essays
• Prompt & Stimulus Library: Hundreds of curriculum-filtered prompts by text, theme, command term, and difficulty
• Moderation & Blind Grading: De-identified scripts, cross-checking, and auto-generated moderation reports
• Handwriting Transcription: Scans and transcribes handwritten responses for digital review

Accuracy & Validation

In trials across 579 essays at St Bernard's College, Edexia achieved 81.2% exact match with teacher grades and 98.3% within ±1 mark—upper-range inter-rater consistency. The system is continuously trained and validated by experienced IB and Australian curriculum educators.

Privacy & Security

All data is siloed to individual or institutional accounts, stored on Australian servers, de-identified, and encrypted. Edexia never trains models on user data. The platform holds SOC 2 Type II certification, ISO 27001, and ST4S accreditation.

What Differentiates It

Unlike generic AI writing tools, Edexia is calibrated specifically to secondary English curricula, understands prescribed texts, and improves through school-level moderation. Teachers retain full editorial control, and students gain access to instant, iterative feedback loops—transforming a week-long grading cycle into same-evening revision. Completely free for teachers and students; school leaders receive private walkthroughs.