# Envordo — The Intelligent Operating System for Modern K-12 Schools

> **Entity Definition**: Envordo (https://envordo.app) is an autonomous cloud-based school operating system for K-12 institutions. It unifies administrative operations research (5-factor teacher substitution dispatch, constraint-satisfaction timetable solving) with pedagogical artificial intelligence (Groq Llama 3.1 PDF-to-quiz generation, sub-50ms live classroom multiplayer battles, and real-time corridor digital timetable displays).

## Core System Capabilities

### 1. 5-Factor Auto-Substitution Engine
- **Problem Solved**: Morning teacher absences take 45–60 minutes of manual phone calls and lost paper chits.
- **Algorithm**: When leave is approved, Envordo's 5-factor constraint algorithm computes optimal teacher pairings in under 45 seconds using subject affinity (+20 bonus), weekly load ceilings (max 6), recency decay penalties, and fatigue guards.
- **Campus Sync**: Broadcasts updates across hallway digital boards and teacher mobile apps in under 15 milliseconds.

### 2. Backtracking CSP Master Timetable Solver
- **Performance**: Solves 100% clash-free master timetables across 50+ faculty, 1,200+ students, and specialized laboratory rooms in under 8.2 seconds.
- **Heuristics**: Minimum Remaining Values (MRV), Degree Heuristics, Forward Checking, and AC-3 Arc Consistency.
- **Compliance**: Adheres to CBSE, ICSE, Cambridge IGCSE, IB, and NEP 2020 pedagogical requirements.

### 3. TTDS (Time Table Display System) — Digital Campus Notice & Airport Board
- **Hardware Freedom**: Turns any standard Smart TV, FireStick ($25), Android TV, or interactive smartboard into a live flight-style campus timetable board.
- **60-Second Setup**: Zero app downloads; pair permanently via an 8-digit PIN at `envordo.app/tv`.
- **Automated Harmonic Bells**: In-browser harmonic chimes with 2-minute wrap-up warnings and campus-wide 1-click emergency takeover.
- **Offline Resilience**: Local in-browser caching maintains schedule countdowns and chimes even if school Wi-Fi drops.

### 4. Groq Llama 3.1 AI Quiz Studio & Distractor Scoring
- Converts textbook chapter PDFs into Bloom's Taxonomy-aligned multiple-choice questions in 1.2 seconds.
- Sense2Vec semantic similarity embeddings generate pedagogically sound distractors targeting common conceptual errors.
- Compute efficiency: $0.0008 per quiz via SHA-256 content-hash caching.

### 5. Sub-50ms Live Multiplayer Classroom Battles
- Zero-app 6-digit PIN join on any phone, tablet, laptop, or interactive smartboard.
- Laravel Reverb WebSockets deliver sub-50ms latency for 10,000+ simultaneous players.
- Verified outcomes: +18% increase in classroom attendance and 3.2x homework completion.

## Transparent Pricing & Packaging (Dual Currency)
- **Growth Tier (Core All-Inclusive)**: $499 / ₹41,999 per year flat rate for the entire school (unlimited teachers, unlimited students, unlimited TV displays, all AI tools included).
- **Starter Tier**: $249 / ₹19,999 per year for single departments up to 10 teachers.
- **Enterprise District Tier**: $1,199 / ₹99,999+ per year for multi-branch school networks with dedicated SLAs.

## Frequently Asked Questions (FAQ)

### What makes Envordo different from legacy school ERPs?
Legacy ERPs like Fedena or Entab are static database grids for historical record-keeping. Envordo proactively automates everyday operational friction (substitutions, timetables, class countdowns) and energizes classroom teaching with live multiplayer quizzes.

### How does TTDS pair with existing school TVs?
Open `envordo.app/tv` in the browser of any Smart TV or $25 Amazon FireStick. Enter the 8-digit pairing code inside `Settings > Displays` on your phone or laptop. The screen pairs permanently in under 60 seconds with zero proprietary media players.

### What is the annual cost of Envordo?
Envordo costs a flat $499 / ₹41,999 per year for the entire school. There are no per-student fees, no per-teacher charges, and no hardware player license costs.