# WIA-EDU-006: Virtual Classroom Standard v1.0 **Status:** Release Candidate **Date:** 2025-01-15 **Authors:** WIA Education Committee **Category:** Education (EDU) --- ## Abstract WIA-EDU-006 defines a comprehensive standard for virtual classroom platforms, covering video streaming, interactive collaboration tools, breakout room management, attendance tracking, and real-time engagement analytics. This standard enables interoperability between educational technology platforms and provides best practices for delivering high-quality online learning experiences. ## 1. Introduction ### 1.1 Purpose This standard provides: - Unified APIs for virtual classroom components - Video and audio streaming specifications - Interactive whiteboard protocols - Breakout room management standards - Attendance and engagement tracking frameworks - LMS integration specifications ### 1.2 Scope This standard applies to: - K-12 and higher education institutions - Corporate training platforms - Online tutoring services - Massive Open Online Courses (MOOCs) - Virtual workshops and webinars ### 1.3 Definitions - **Virtual Classroom**: Online environment for synchronous learning - **Breakout Room**: Smaller session for group discussions - **Whiteboard**: Shared collaborative canvas - **Attendance**: Real-time tracking of participant presence - **Engagement**: Metrics measuring student interaction and attention ## 2. Architecture ### 2.1 System Components ``` ┌─────────────────────────────────────────────────────────┐ │ Virtual Classroom System │ ├─────────────────────────────────────────────────────────┤ │ ┌──────────┐ ┌──────────┐ ┌───────────┐ │ │ │ Video │ │Whiteboard│ │ Breakout │ │ │ │ Stream │ │ & Chat │ │ Rooms │ │ │ └──────────┘ └──────────┘ └───────────┘ │ │ ↓ ↓ ↓ │ │ ┌─────────────────────────────────────────┐ │ │ │ Analytics & Engagement Tracking │ │ │ └─────────────────────────────────────────┘ │ └─────────────────────────────────────────────────────────┘ ``` ### 2.2 Video Streaming Layer **WebRTC Configuration:** ```json { "video": { "codec": "VP9", "resolution": "1920x1080", "frameRate": 30, "bitrate": { "min": 500, "max": 4000, "start": 1500 }, "adaptiveBitrate": true }, "audio": { "codec": "Opus", "sampleRate": 48000, "channels": 2, "bitrate": 128 } } ``` **SFU Architecture:** - Selective Forwarding Unit for scalability - Support for 1000+ concurrent participants - Automatic quality adaptation based on bandwidth - Multi-stream support (camera, screen share) ### 2.3 Whiteboard Layer **Canvas Format:** ```json { "whiteboardId": "wb_abc123", "sessionId": "session_xyz789", "pages": [ { "pageId": "page_001", "width": 1920, "height": 1080, "background": "#FFFFFF", "objects": [ { "type": "path", "tool": "pen", "color": "#000000", "width": 2, "points": [[100, 200], [150, 250], [200, 220]], "timestamp": 1704067200000, "userId": "user_123" }, { "type": "text", "content": "Important concept", "x": 300, "y": 400, "fontSize": 18, "color": "#10B981", "timestamp": 1704067205000, "userId": "user_456" } ] } ], "currentPage": 0 } ``` **Supported Tools:** - Pen, highlighter, eraser - Shapes (rectangle, circle, line, arrow) - Text with LaTeX support - File upload and annotation - Image embedding ### 2.4 Breakout Room Layer **Room Configuration:** ```json { "sessionId": "session_xyz789", "breakoutRooms": [ { "roomId": "room_001", "name": "Group 1", "participants": ["user_123", "user_456", "user_789"], "duration": 15, "autoReturn": true, "startTime": 1704067200000 } ], "settings": { "allowSelfSelect": false, "enableTimer": true, "allowInstructorBroadcast": true, "recordRooms": false } } ``` ## 3. Core APIs ### 3.1 Session Management API **Create Session:** ```http POST /api/v1/sessions Content-Type: application/json { "title": "Introduction to Machine Learning", "instructor": { "userId": "instructor_123", "name": "Dr. Sarah Johnson", "email": "sarah@university.edu" }, "schedule": { "startTime": "2025-01-20T10:00:00Z", "duration": 90, "timezone": "America/Los_Angeles" }, "settings": { "maxStudents": 100, "waitingRoom": true, "requirePassword": true, "password": "ML2025", "enableRecording": true, "muteOnEntry": true } } ``` **Response:** ```json { "sessionId": "session_xyz789", "title": "Introduction to Machine Learning", "joinUrl": "https://classroom.wia.org/session_xyz789", "instructorUrl": "https://classroom.wia.org/session_xyz789?role=instructor&token=abc123", "status": "scheduled", "createdAt": "2025-01-15T08:00:00Z" } ``` ### 3.2 Attendance API **Get Attendance:** ```http GET /api/v1/sessions/{sessionId}/attendance Authorization: Bearer {token} ``` **Response:** ```json { "sessionId": "session_xyz789", "totalEnrolled": 95, "present": 87, "late": 5, "absent": 3, "participants": [ { "userId": "user_123", "name": "John Doe", "email": "john@university.edu", "joinTime": "2025-01-20T10:02:00Z", "status": "present", "duration": 88, "attentionScore": 92, "participationScore": 85 } ] } ``` ### 3.3 Whiteboard API **Create Drawing:** ```http POST /api/v1/whiteboards/{whiteboardId}/draw Content-Type: application/json { "type": "path", "tool": "pen", "color": "#000000", "width": 2, "points": [[100, 200], [150, 250], [200, 220]] } ``` ### 3.4 Breakout Rooms API **Create Rooms:** ```http POST /api/v1/sessions/{sessionId}/breakout-rooms Content-Type: application/json { "count": 5, "duration": 15, "assignmentMethod": "automatic", "allowSelfSelect": false } ``` **Response:** ```json { "rooms": [ { "roomId": "room_001", "name": "Group 1", "participants": ["user_123", "user_456", "user_789"] }, { "roomId": "room_002", "name": "Group 2", "participants": ["user_234", "user_567", "user_890"] } ] } ``` ## 4. Data Formats ### 4.1 Session State ```json { "sessionId": "session_xyz789", "status": "active", "startTime": "2025-01-20T10:00:00Z", "duration": 90, "participantCount": 87, "recording": { "enabled": true, "status": "recording", "startTime": "2025-01-20T10:00:00Z" }, "whiteboard": { "enabled": true, "whiteboardId": "wb_abc123" }, "breakoutRooms": { "active": false, "rooms": [] }, "settings": { "chat": true, "screenShare": true, "handRaise": true } } ``` ### 4.2 Engagement Metrics ```json { "sessionId": "session_xyz789", "metrics": { "averageAttention": 85, "participationRate": 72, "chatMessages": 156, "questionsAsked": 23, "handRaises": 18, "pollResponses": 82, "quizParticipation": 95 }, "timeline": [ { "timestamp": "2025-01-20T10:00:00Z", "participants": 87, "attention": 92 }, { "timestamp": "2025-01-20T10:15:00Z", "participants": 89, "attention": 88 } ] } ``` ## 5. Security & Privacy ### 5.1 Encryption - TLS 1.3 for all API communications - End-to-end encryption for WebRTC streams (DTLS-SRTP) - AES-256 encryption for recordings - Encrypted storage for personal data ### 5.2 Authentication **OAuth 2.0 / OIDC:** ```http POST /oauth/token Content-Type: application/x-www-form-urlencoded grant_type=authorization_code& code=abc123& client_id=your_client_id& client_secret=your_client_secret ``` **JWT Token:** ```json { "sub": "user_123", "name": "John Doe", "email": "john@university.edu", "role": "student", "sessionId": "session_xyz789", "iat": 1704067200, "exp": 1704153600 } ``` ### 5.3 Compliance - FERPA (Family Educational Rights and Privacy Act) - GDPR (General Data Protection Regulation) - COPPA (Children's Online Privacy Protection Act) - CCPA (California Consumer Privacy Act) ## 6. Performance Requirements ### 6.1 Latency Targets | Component | Target Latency | |-----------|---------------| | Video | < 100 ms | | Audio | < 60 ms | | Whiteboard Sync | < 50 ms | | Chat Messages | < 30 ms | ### 6.2 Scalability - Support 1000+ participants per session - 100,000+ concurrent sessions globally - Auto-scaling based on demand - CDN distribution for recordings ### 6.3 Availability - 99.9% uptime SLA - Multi-region deployment - Automatic failover - Disaster recovery ## 7. Integration ### 7.1 LMS Integration **Canvas LTI Integration:** ```xml WIA Virtual Classroom Virtual classroom integration https://classroom.wia.org/lti/launch https://classroom.wia.org/lti/launch ``` ### 7.2 Gradebook Sync ```http POST /api/v1/lms/gradebook/sync Content-Type: application/json { "sessionId": "session_xyz789", "lmsType": "canvas", "courseId": "course_456", "assignmentId": "assignment_789", "grades": [ { "userId": "user_123", "score": 95, "maxScore": 100 } ] } ``` ## 8. Best Practices ### 8.1 Session Management 1. Enable waiting room for security 2. Mute participants on entry for large classes 3. Use breakout rooms for interactive sessions 4. Record sessions for asynchronous access 5. Enable transcription for accessibility ### 8.2 Engagement 1. Use polls every 10-15 minutes 2. Enable hand-raise for questions 3. Monitor attention metrics 4. Create breakout rooms for discussions 5. Use whiteboard for visual explanations ### 8.3 Accessibility 1. Provide closed captions 2. Enable keyboard navigation 3. Support screen readers 4. High contrast mode 5. Adjustable font sizes ## 9. Error Handling ### 9.1 Error Codes | Code | Description | |------|-------------| | 1001 | Session not found | | 1002 | Unauthorized access | | 1003 | Session capacity reached | | 1004 | Invalid session state | | 2001 | Whiteboard error | | 3001 | Recording failed | ### 9.2 Error Response Format ```json { "error": { "code": 1003, "message": "Session capacity reached", "details": "Maximum 100 participants allowed", "timestamp": "2025-01-20T10:00:00Z" } } ``` ## 10. Future Enhancements - AI-powered auto-captioning in 40+ languages - Virtual reality classroom environments - Automated attendance with facial recognition - Real-time language translation - Advanced analytics with ML insights - Integration with metaverse platforms --- ## Appendix A: WebRTC Configuration ```javascript const config = { iceServers: [ { urls: 'stun:stun.wia.org:3478' }, { urls: 'turn:turn.wia.org:3478', username: 'user', credential: 'pass' } ], iceTransportPolicy: 'all', bundlePolicy: 'max-bundle', rtcpMuxPolicy: 'require' }; ``` ## Appendix B: Webhook Events ```json { "event": "session.started", "timestamp": "2025-01-20T10:00:00Z", "data": { "sessionId": "session_xyz789", "participantCount": 87 } } ``` --- **© 2025 WIA - World Certification Industry Association** **弘益人間 (홍익인간) · Benefit All Humanity**