Product_Requirements_Document

Educational Flashcard Application - Product Requirements Document

1. Product Overview

An interactive Flutter-based educational application that facilitates knowledge revision through smart flashcards with spaced repetition learning. The app helps students efficiently learn and retain information across multiple subjects and grade levels through scientifically-proven spaced repetition algorithms.

The application targets students from elementary to high school levels, providing personalized learning experiences that adapt to individual progress and optimize retention through the SM-2 algorithm similar to Anki's approach.

2. Core Features

2.1 User Roles

2.2 Feature Module

Our educational flashcard application consists of the following main pages:

1. Home Page: Grade selector, subject navigation, progress overview dashboard
2. Subject Selection Page: Subject cards with progress indicators, unit listings
3. Unit Detail Page: Flashcard deck overview, study session options, progress statistics
4. Flashcard Study Page: Interactive flashcard presentation, MCQ integration, spaced repetition controls
5. Progress Dashboard: Learning analytics, performance charts, streak tracking
6. Profile Settings Page: User preferences, study reminders, account management

2.3 Page Details

3. Core Process

Student Learning Flow: Students begin by selecting their grade level, then choose a subject of interest. Within each subject, they can browse available units and start study sessions. During study sessions, students interact with flashcards, answer MCQs, and rate their performance. The SM-2 algorithm automatically schedules future reviews based on their responses.

Spaced Repetition Flow: When students rate flashcard difficulty, the system calculates the next review date using the SM-2 algorithm. Cards marked as "Again" appear sooner, while "Easy" cards have longer intervals. The system maintains individual scheduling for each flashcard based on the student's performance history.

graph TD
    A[Home Page] --> B[Grade Selection]
    B --> C[Subject Selection]
    C --> D[Unit Detail]
    D --> E[Flashcard Study]
    E --> F{MCQ After 3 Cards?}
    F -->|Yes| G[Multiple Choice Question]
    F -->|No| H[Next Flashcard]
    G --> I[Difficulty Rating]
    H --> I
    I --> J{More Cards?}
    J -->|Yes| E
    J -->|No| K[Session Complete]
    K --> L[Progress Dashboard]
    L --> A
    E --> M[Progress Dashboard]
    M --> A

4. User Interface Design

4.1 Design Style

• Primary Colors: Deep Purple (#6366F1) for primary actions, Light Purple (#E0E7FF) for backgrounds
• Secondary Colors: Green (#10B981) for success states, Orange (#F59E0B) for warnings, Red (#EF4444) for errors
• Button Style: Rounded corners (12px radius), elevated shadows, with smooth press animations
• Typography: Inter font family, 16px base size for body text, 24px for headings, 14px for captions
• Layout Style: Card-based design with consistent 16px padding, clean white backgrounds with subtle shadows
• Icons: Outlined style icons from Heroicons, consistent 24px size, with subject-specific colored accents

4.2 Page Design Overview

4.3 Responsiveness

The application is designed mobile-first with adaptive layouts for tablets. Touch interactions are optimized with appropriate button sizes (minimum 44px) and gesture support for card flipping. The interface adapts to different screen sizes while maintaining consistent spacing and readability.