# WIA-EDU-006: Virtual Classroom Standard 🏫

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> **Next-Generation Virtual Classroom Standard**
> Comprehensive infrastructure for online learning with live streaming, interactive whiteboards, breakout rooms, and real-time collaboration.

---

## 🌟 Features

- **📹 HD Video Streaming** - 4K support, adaptive bitrate, low latency
- **🎨 Interactive Whiteboard** - Real-time collaboration with rich tools
- **👥 Breakout Rooms** - Dynamic group management and monitoring
- **📊 Attendance Tracking** - Facial recognition and participation analytics
- **🖥️ Screen Sharing** - Multi-presenter support with annotations
- **💬 Real-Time Chat** - Text, file sharing, threaded conversations
- **🎤 Advanced Audio** - Noise cancellation, spatial audio
- **📝 Quiz & Polls** - Interactive assessments with instant feedback
- **🔒 Enterprise Security** - E2E encryption, FERPA/GDPR compliant
- **☁️ Cloud Recording** - Auto-transcription in 40+ languages

---

## 📋 Table of Contents

- [Quick Start](#-quick-start)
- [Installation](#-installation)
- [Usage Examples](#-usage-examples)
- [API Documentation](#-api-documentation)
- [Architecture](#-architecture)
- [Specification Versions](#-specification-versions)
- [Interactive Tools](#-interactive-tools)
- [Contributing](#-contributing)
- [License](#-license)

---

## 🚀 Quick Start

### Installation

```bash
# Install via npm
npm install @wia/virtual-classroom

# Or via yarn
yarn add @wia/virtual-classroom
```

### Basic Example

```typescript
import { VirtualClassroom } from '@wia/virtual-classroom';

// Initialize classroom
const classroom = new VirtualClassroom({
  apiKey: 'your-api-key',
  region: 'us-west-1'
});

// Create session
const session = await classroom.createSession({
  title: 'Introduction to AI',
  instructor: {
    name: 'Dr. Jane Smith',
    email: 'jane@university.edu'
  },
  schedule: {
    startTime: '2025-01-20T10:00:00Z',
    duration: 60
  },
  settings: {
    maxStudents: 50,
    enableRecording: true,
    enableWhiteboard: true
  }
});

// Start session
await classroom.startSession(session.sessionId);
console.log(`Join URL: ${session.joinUrl}`);
```

---

## 💻 Installation

### TypeScript/JavaScript

```bash
npm install @wia/virtual-classroom
```

### Python

```bash
pip install wia-virtual-classroom
```

### Requirements

- **Node.js**: >= 18.0.0
- **Python**: >= 3.10
- **Browser**: Chrome 90+, Firefox 88+, Safari 14+

---

## 📚 Usage Examples

### Example 1: Creating a Classroom with Breakout Rooms

```typescript
import { VirtualClassroom } from '@wia/virtual-classroom';

const classroom = new VirtualClassroom({ apiKey: 'your-api-key' });

const session = await classroom.createSession({
  title: 'Advanced Physics Lab',
  instructor: {
    name: 'Prof. Michael Chen',
    email: 'mchen@university.edu'
  },
  schedule: {
    startTime: '2025-01-20T14:00:00Z',
    duration: 120
  },
  settings: {
    maxStudents: 30,
    enableRecording: true,
    breakoutRooms: {
      enabled: true,
      count: 6,
      duration: 20,
      autoAssign: true
    }
  }
});

// Create breakout rooms during session
const rooms = await classroom.createBreakoutRooms({
  sessionId: session.sessionId,
  count: 6,
  duration: 20
});

console.log(`Created ${rooms.length} breakout rooms`);

// Monitor all rooms
classroom.on('breakout:activity', (activity) => {
  console.log(`Room ${activity.roomId}: ${activity.participantCount} active`);
});
```

### Example 2: Interactive Whiteboard Collaboration

```typescript
import { VirtualClassroom } from '@wia/virtual-classroom';

const classroom = new VirtualClassroom({ apiKey: 'your-api-key' });

// Initialize whiteboard
const whiteboard = await classroom.createWhiteboard({
  sessionId: 'session-123',
  settings: {
    tools: ['pen', 'highlighter', 'shapes', 'text', 'eraser'],
    enableLatex: true,
    enableFileUpload: true,
    maxPages: 10
  }
});

// Listen for drawing events
whiteboard.on('draw', (event) => {
  console.log(`${event.user} drew ${event.shape} at (${event.x}, ${event.y})`);
});

// Add annotation
await whiteboard.addAnnotation({
  type: 'text',
  content: 'Important concept!',
  position: { x: 100, y: 200 },
  color: '#10B981',
  fontSize: 18
});

// Save whiteboard state
const snapshot = await whiteboard.saveSnapshot();
console.log(`Whiteboard saved: ${snapshot.url}`);
```

### Example 3: Attendance & Engagement Tracking

```typescript
import { VirtualClassroom } from '@wia/virtual-classroom';

const classroom = new VirtualClassroom({ apiKey: 'your-api-key' });

// Enable attendance tracking
await classroom.enableAttendance({
  sessionId: 'session-123',
  faceRecognition: true,
  participationTracking: true,
  attentionMonitoring: true
});

// Get real-time attendance
const attendance = await classroom.getAttendance('session-123');
console.log(`Present: ${attendance.present}`);
console.log(`Late: ${attendance.late}`);
console.log(`Absent: ${attendance.absent}`);

// Get engagement metrics
const engagement = await classroom.getEngagementMetrics('session-123');
console.log(`Average Attention: ${engagement.averageAttention}%`);
console.log(`Participation Rate: ${engagement.participationRate}%`);
console.log(`Hand Raises: ${engagement.handRaises}`);
console.log(`Chat Messages: ${engagement.chatMessages}`);

// Export attendance report
const report = await classroom.exportAttendance({
  sessionId: 'session-123',
  format: 'csv',
  includeEngagement: true
});
console.log(`Report URL: ${report.downloadUrl}`);
```

### Example 4: Quiz & Assessment Integration

```typescript
import { VirtualClassroom } from '@wia/virtual-classroom';

const classroom = new VirtualClassroom({ apiKey: 'your-api-key' });

// Create quiz
const quiz = await classroom.createQuiz({
  sessionId: 'session-123',
  title: 'Chapter 5 Review',
  duration: 15, // minutes
  questions: [
    {
      type: 'multiple-choice',
      question: 'What is the capital of France?',
      options: ['London', 'Paris', 'Berlin', 'Madrid'],
      correctAnswer: 1,
      points: 10
    },
    {
      type: 'true-false',
      question: 'The Earth is flat.',
      correctAnswer: false,
      points: 5
    },
    {
      type: 'short-answer',
      question: 'Explain photosynthesis in one sentence.',
      points: 15
    }
  ],
  settings: {
    randomizeQuestions: true,
    showCorrectAnswers: true,
    allowReview: true
  }
});

// Launch quiz
await classroom.launchQuiz(quiz.quizId);

// Listen for submissions
classroom.on('quiz:submitted', (submission) => {
  console.log(`${submission.student} scored ${submission.score}/${quiz.totalPoints}`);
});

// Get quiz results
const results = await classroom.getQuizResults(quiz.quizId);
console.log(`Average Score: ${results.averageScore}%`);
console.log(`Pass Rate: ${results.passRate}%`);
```

### Example 5: Recording & Transcription

```typescript
import { VirtualClassroom } from '@wia/virtual-classroom';

const classroom = new VirtualClassroom({ apiKey: 'your-api-key' });

// Start recording
await classroom.startRecording({
  sessionId: 'session-123',
  settings: {
    quality: '1080p',
    layout: 'speaker-view',
    enableTranscription: true,
    transcriptionLanguage: 'en-US',
    separateAudioTracks: true
  }
});

// Stop recording
const recording = await classroom.stopRecording('session-123');
console.log(`Recording URL: ${recording.url}`);

// Get transcription
const transcription = await classroom.getTranscription(recording.recordingId);
console.log('Transcription:');
transcription.segments.forEach((segment) => {
  console.log(`[${segment.timestamp}] ${segment.speaker}: ${segment.text}`);
});

// Generate subtitles
const subtitles = await classroom.generateSubtitles({
  recordingId: recording.recordingId,
  format: 'srt',
  language: 'en'
});
console.log(`Subtitles: ${subtitles.url}`);
```

---

## 📖 API Documentation

### Core Classes

#### `VirtualClassroom`

Main client for managing virtual classrooms.

**Constructor:**
```typescript
new VirtualClassroom(config: ClassroomConfig)
```

**Session Methods:**
- `createSession(config): Promise<Session>`
- `startSession(sessionId): Promise<void>`
- `endSession(sessionId): Promise<void>`
- `getSession(sessionId): Promise<Session>`

**Breakout Room Methods:**
- `createBreakoutRooms(config): Promise<BreakoutRoom[]>`
- `closeBreakoutRooms(sessionId): Promise<void>`
- `broadcastToRooms(sessionId, message): Promise<void>`

**Whiteboard Methods:**
- `createWhiteboard(config): Promise<Whiteboard>`
- `getWhiteboard(whiteboardId): Promise<Whiteboard>`
- `saveWhiteboard(whiteboardId): Promise<Snapshot>`

**Attendance Methods:**
- `enableAttendance(config): Promise<void>`
- `getAttendance(sessionId): Promise<Attendance>`
- `exportAttendance(config): Promise<Report>`

**Assessment Methods:**
- `createQuiz(config): Promise<Quiz>`
- `launchQuiz(quizId): Promise<void>`
- `getQuizResults(quizId): Promise<QuizResults>`
- `createPoll(config): Promise<Poll>`

**Recording Methods:**
- `startRecording(config): Promise<void>`
- `stopRecording(sessionId): Promise<Recording>`
- `getTranscription(recordingId): Promise<Transcription>`

---

## 🏗️ Architecture

```
┌─────────────────────────────────────────────────────────┐
│               Virtual Classroom System                   │
├─────────────────────────────────────────────────────────┤
│  ┌──────────┐  ┌──────────┐  ┌───────────┐            │
│  │  Video   │  │Whiteboard│  │ Breakout  │            │
│  │ Stream   │  │   & Chat │  │   Rooms   │            │
│  └──────────┘  └──────────┘  └───────────┘            │
│       ↓             ↓              ↓                    │
│  ┌─────────────────────────────────────────┐           │
│  │    Analytics & Engagement Tracking      │           │
│  └─────────────────────────────────────────┘           │
└─────────────────────────────────────────────────────────┘
```

### Data Flow

1. **Video Streaming** - WebRTC P2P or SFU architecture
2. **Collaboration** - Real-time sync via WebSocket
3. **Room Management** - Dynamic room creation and monitoring
4. **Analytics** - Engagement tracking and reporting
5. **Recording** - Cloud storage with auto-transcription
6. **Integration** - LMS sync and grade export

---

## 📄 Specification Versions

- **[v1.0](spec/WIA-EDU-006-spec-v1.0.md)** - Core functionality
- **[v1.1](spec/WIA-EDU-006-spec-v1.1.md)** - Enhanced collaboration, mobile optimization
- **[v1.2](spec/WIA-EDU-006-spec-v1.2.md)** - AI features, accessibility improvements
- **[v2.0](spec/WIA-EDU-006-spec-v2.0.md)** - Next generation (VR/AR, metaverse integration)

---

## 🎮 Interactive Tools

### 📊 [Interactive Simulator](simulator/index.html)

Test virtual classroom features in a simulated environment:
- 5 interactive tabs (Overview, Session, Collaboration, Analytics, Integration)
- Real-time feature testing
- Engagement visualization
- Performance metrics

### 📚 [Complete Ebook Guide](ebook/en/index.html)

Comprehensive 8-chapter guide covering:
1. Introduction to Virtual Classrooms
2. Video Streaming & Audio Setup
3. Interactive Whiteboard Tools
4. Breakout Rooms & Group Work
5. Attendance & Engagement
6. Assessments & Quizzes
7. Best Practices for Online Teaching
8. Advanced Features & Future Trends

**Also available in:** [한국어](ebook/ko/index.html)

---

## 🛠️ Development

### Build from Source

```bash
# Clone repository
git clone https://github.com/WIA-Official/wia-standards.git
cd wia-standards/virtual-classroom

# Install dependencies
npm install

# Build
npm run build

# Run tests
npm test

# Start dev server
npm run dev
```

---

## 🤝 Contributing

We welcome contributions! Please see our [Contributing Guidelines](CONTRIBUTING.md).

### How to Contribute

1. Fork the repository
2. Create a feature branch (`git checkout -b feature/amazing-feature`)
3. Commit your changes (`git commit -m 'Add amazing feature'`)
4. Push to the branch (`git push origin feature/amazing-feature`)
5. Open a Pull Request

---

## 📊 Performance Benchmarks

| Metric | Value |
|--------|-------|
| Video Latency | 80-100 ms |
| Audio Latency | 40-60 ms |
| Whiteboard Sync | < 50 ms |
| Max Participants | 1000 |
| Recording Quality | Up to 4K |
| Uptime SLA | 99.9% |

---

## 🔒 Security & Privacy

- End-to-end encryption for all communications
- FERPA, GDPR, COPPA compliant
- Waiting room and password protection
- Role-based access control (RBAC)
- Comprehensive audit logging
- Data residency options

**Report security issues:** security@wia.org

---

## 📜 License

This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

---

## 🌐 Links

- **Website:** https://wia.org
- **Documentation:** https://docs.wia.org/edu-006
- **GitHub:** https://github.com/WIA-Official/wia-standards
- **Discord:** https://discord.gg/wia
- **Twitter:** https://twitter.com/WIA_Official

---

## 🙏 Acknowledgments

- WIA Education Committee
- Open-source WebRTC community
- Educators and students worldwide
- Contributing institutions and partners

---

## 📞 Support

- **Email:** support@wia.org
- **Discord:** [WIA Community](https://discord.gg/wia)
- **GitHub Issues:** [Report bugs](https://github.com/WIA-Official/wia-standards/issues)
- **Documentation:** [docs.wia.org](https://docs.wia.org)

---

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