diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..20c52df
Binary files /dev/null and b/.DS_Store differ
diff --git a/ERD.sql b/ERD.sql
new file mode 100644
index 0000000..9404fb7
--- /dev/null
+++ b/ERD.sql
@@ -0,0 +1,202 @@
+-- Create Database
+CREATE DATABASE StudentSchedulerDB;
+USE StudentSchedulerDB;
+
+-- User/Account Management
+CREATE TABLE Users (
+    user_id INT PRIMARY KEY AUTO_INCREMENT,
+    username VARCHAR(50) UNIQUE NOT NULL,
+    password_hash VARCHAR(255) NOT NULL,
+    email VARCHAR(100) UNIQUE NOT NULL,
+    full_name VARCHAR(100) NOT NULL,
+    role ENUM('Teacher', 'Admin', 'View-Only') NOT NULL,
+    is_2fa_enabled BOOLEAN DEFAULT FALSE,
+    last_login DATETIME,
+    account_created DATETIME DEFAULT CURRENT_TIMESTAMP,
+    account_active BOOLEAN DEFAULT TRUE
+);
+
+-- Student Management
+CREATE TABLE Students (
+    student_id VARCHAR(20) PRIMARY KEY,
+    user_id INT UNIQUE,
+    full_name VARCHAR(100) NOT NULL,
+    date_of_birth DATE NOT NULL,
+    grade_level VARCHAR(10) NOT NULL,
+    emergency_contact_name VARCHAR(100) NOT NULL,
+    emergency_contact_phone VARCHAR(20) NOT NULL,
+    photo_path VARCHAR(255),
+    medical_notes TEXT,
+    is_active BOOLEAN DEFAULT TRUE,
+    created_date DATETIME DEFAULT CURRENT_TIMESTAMP,
+    last_updated DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES Users(user_id) ON DELETE SET NULL
+);
+
+-- Medical Information
+CREATE TABLE MedicalInformation (
+    medical_id INT PRIMARY KEY AUTO_INCREMENT,
+    student_id VARCHAR(20) NOT NULL,
+    allergy_type VARCHAR(100),
+    allergy_details TEXT,
+    medication_name VARCHAR(100),
+    medication_details TEXT,
+    additional_notes TEXT,
+    created_date DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (student_id) REFERENCES Students(student_id) ON DELETE CASCADE
+);
+
+-- Room/Classroom Management
+CREATE TABLE Rooms (
+    room_id INT PRIMARY KEY AUTO_INCREMENT,
+    room_number VARCHAR(20) UNIQUE NOT NULL,
+    building_name VARCHAR(50),
+    capacity INT NOT NULL,
+    has_computers BOOLEAN DEFAULT FALSE,
+    has_lab_equipment BOOLEAN DEFAULT FALSE,
+    special_equipment_notes TEXT,
+    is_active BOOLEAN DEFAULT TRUE
+);
+
+-- Subject/Course Management
+CREATE TABLE Subjects (
+    subject_id INT PRIMARY KEY AUTO_INCREMENT,
+    subject_code VARCHAR(20) UNIQUE NOT NULL,
+    subject_name VARCHAR(100) NOT NULL,
+    description TEXT,
+    credit_hours INT,
+    is_active BOOLEAN DEFAULT TRUE
+);
+
+-- Class Schedule Management
+CREATE TABLE ClassSchedules (
+    class_id INT PRIMARY KEY AUTO_INCREMENT,
+    subject_id INT NOT NULL,
+    teacher_id INT NOT NULL,
+    room_id INT NOT NULL,
+    schedule_pattern ENUM('Weekly', 'Bi-Weekly', 'One-Time') DEFAULT 'Weekly',
+    max_students INT DEFAULT 30,
+    start_date DATE NOT NULL,
+    end_date DATE,
+    is_active BOOLEAN DEFAULT TRUE,
+    created_date DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (subject_id) REFERENCES Subjects(subject_id),
+    FOREIGN KEY (teacher_id) REFERENCES Users(user_id),
+    FOREIGN KEY (room_id) REFERENCES Rooms(room_id)
+);
+
+-- Schedule Time Slots
+CREATE TABLE ScheduleTimeSlots (
+    time_slot_id INT PRIMARY KEY AUTO_INCREMENT,
+    class_id INT NOT NULL,
+    day_of_week ENUM('Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'),
+    start_time TIME NOT NULL,
+    end_time TIME NOT NULL,
+    is_recurring BOOLEAN DEFAULT TRUE,
+    specific_date DATE,
+    FOREIGN KEY (class_id) REFERENCES ClassSchedules(class_id) ON DELETE CASCADE,
+    UNIQUE KEY unique_schedule (room_id, day_of_week, start_time, specific_date),
+    UNIQUE KEY unique_teacher_schedule (teacher_id, day_of_week, start_time, specific_date)
+);
+
+-- Student Enrollment
+CREATE TABLE StudentEnrollments (
+    enrollment_id INT PRIMARY KEY AUTO_INCREMENT,
+    student_id VARCHAR(20) NOT NULL,
+    class_id INT NOT NULL,
+    enrollment_date DATETIME DEFAULT CURRENT_TIMESTAMP,
+    enrollment_status ENUM('Active', 'Dropped', 'Completed') DEFAULT 'Active',
+    drop_date DATE,
+    FOREIGN KEY (student_id) REFERENCES Students(student_id),
+    FOREIGN KEY (class_id) REFERENCES ClassSchedules(class_id),
+    UNIQUE KEY unique_enrollment (student_id, class_id)
+);
+
+-- Attendance Tracking
+CREATE TABLE Attendance (
+    attendance_id INT PRIMARY KEY AUTO_INCREMENT,
+    enrollment_id INT NOT NULL,
+    class_date DATE NOT NULL,
+    time_slot_id INT NOT NULL,
+    status ENUM('Present', 'Absent', 'Late', 'Excused') NOT NULL,
+    notes TEXT,
+    recorded_by INT NOT NULL,
+    recorded_time DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (enrollment_id) REFERENCES StudentEnrollments(enrollment_id),
+    FOREIGN KEY (time_slot_id) REFERENCES ScheduleTimeSlots(time_slot_id),
+    FOREIGN KEY (recorded_by) REFERENCES Users(user_id),
+    UNIQUE KEY unique_attendance (enrollment_id, class_date, time_slot_id)
+);
+
+-- Performance/Grades Tracking
+CREATE TABLE StudentPerformance (
+    performance_id INT PRIMARY KEY AUTO_INCREMENT,
+    enrollment_id INT NOT NULL,
+    assessment_date DATE NOT NULL,
+    assessment_type VARCHAR(50),
+    score DECIMAL(5,2),
+    max_score DECIMAL(5,2) DEFAULT 100,
+    grade_letter CHAR(2),
+    teacher_notes TEXT,
+    recorded_by INT NOT NULL,
+    recorded_date DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (enrollment_id) REFERENCES StudentEnrollments(enrollment_id),
+    FOREIGN KEY (recorded_by) REFERENCES Users(user_id)
+);
+
+-- Audit Trail Log
+CREATE TABLE AuditTrail (
+    audit_id INT PRIMARY KEY AUTO_INCREMENT,
+    user_id INT,
+    action_type ENUM('CREATE', 'READ', 'UPDATE', 'DELETE', 'LOGIN', 'LOGOUT', 'EXPORT') NOT NULL,
+    table_name VARCHAR(50) NOT NULL,
+    record_id VARCHAR(100),
+    old_values JSON,
+    new_values JSON,
+    ip_address VARCHAR(45),
+    user_agent TEXT,
+    timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES Users(user_id) ON DELETE SET NULL
+);
+
+-- Bulk Import Log
+CREATE TABLE BulkImportLog (
+    import_id INT PRIMARY KEY AUTO_INCREMENT,
+    user_id INT NOT NULL,
+    filename VARCHAR(255) NOT NULL,
+    import_type ENUM('Students', 'Schedules', 'Enrollments') NOT NULL,
+    total_records INT,
+    successful_records INT,
+    failed_records INT,
+    error_log TEXT,
+    import_date DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES Users(user_id)
+);
+
+-- Indexes for Performance
+CREATE INDEX idx_students_grade ON Students(grade_level);
+CREATE INDEX idx_students_active ON Students(is_active);
+CREATE INDEX idx_schedules_active ON ClassSchedules(is_active);
+CREATE INDEX idx_schedules_dates ON ClassSchedules(start_date, end_date);
+CREATE INDEX idx_enrollments_status ON StudentEnrollments(enrollment_status);
+CREATE INDEX idx_attendance_date ON Attendance(class_date);
+CREATE INDEX idx_audit_user_time ON AuditTrail(user_id, timestamp);
+CREATE INDEX idx_audit_action ON AuditTrail(action_type, table_name);
+
+-- Multi-language Support Table
+CREATE TABLE LanguageTranslations (
+    translation_id INT PRIMARY KEY AUTO_INCREMENT,
+    language_code CHAR(2) NOT NULL,
+    page_section VARCHAR(50) NOT NULL,
+    element_key VARCHAR(100) NOT NULL,
+    translation_text TEXT NOT NULL,
+    last_updated DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    UNIQUE KEY unique_translation (language_code, page_section, element_key)
+);
+
+-- Insert default languages
+INSERT INTO LanguageTranslations (language_code, page_section, element_key, translation_text) VALUES
+('en', 'general', 'welcome', 'Welcome'),
+('ru', 'general', 'welcome', 'Добро пожаловать'),
+('en', 'general', 'logout', 'Logout'),
+('ru', 'general', 'logout', 'Выход');
\ No newline at end of file
diff --git a/README.md b/README.md
deleted file mode 100644
index 13cf335..0000000
--- a/README.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# g10-m3
-
diff --git a/g10-m3-5/database.py b/g10-m3-5/database.py
new file mode 100644
index 0000000..16cd5c7
--- /dev/null
+++ b/g10-m3-5/database.py
@@ -0,0 +1,538 @@
+import sqlite3
+import sys
+
+def create_tables():
+    """Create all core database tables"""
+    
+    conn = sqlite3.connect('school_schedule.db')
+    cursor = conn.cursor()
+    
+    # Drop tables if they exist (for testing)
+    tables = [
+        'students', 'teachers', 'subjects', 'rooms', 
+        'classes', 'timeslots', 'schedule_entries',
+        'tech_tracks', 'english_levels', 'special_groups',
+        'users', 'audit_log'
+    ]
+    
+    for table in tables:
+        try:
+            cursor.execute(f"DROP TABLE IF EXISTS {table}")
+        except:
+            pass
+    
+    # 1. Core Entities
+    cursor.execute('''
+    CREATE TABLE students (
+        student_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        full_name TEXT NOT NULL,
+        date_of_birth DATE,
+        class_group TEXT,
+        emergency_contact TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE teachers (
+        teacher_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        full_name TEXT NOT NULL,
+        department TEXT,
+        email TEXT,
+        qualifications TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE subjects (
+        subject_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        subject_name TEXT NOT NULL,
+        department TEXT,
+        credits INTEGER,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE rooms (
+        room_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        room_number TEXT NOT NULL,
+        capacity INTEGER,
+        equipment TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    # 2. Academic Structure
+    cursor.execute('''
+    CREATE TABLE classes (
+        class_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        class_name TEXT NOT NULL,
+        homeroom_teacher_id INTEGER,
+        academic_year TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (homeroom_teacher_id) REFERENCES teachers(teacher_id)
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE tech_tracks (
+        track_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        track_name TEXT NOT NULL,
+        description TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE english_levels (
+        level_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        level_code TEXT NOT NULL,
+        description TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE special_groups (
+        group_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        group_name TEXT NOT NULL,
+        group_type TEXT,
+        teacher_in_charge_id INTEGER,
+        max_participants INTEGER,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (teacher_in_charge_id) REFERENCES teachers(teacher_id)
+    )
+    ''')
+    
+    # 3. Scheduling Core
+    cursor.execute('''
+    CREATE TABLE timeslots (
+        timeslot_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        day_of_week TEXT NOT NULL,
+        period_number INTEGER,
+        start_time TIME NOT NULL,
+        end_time TIME NOT NULL,
+        academic_module TEXT,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE schedule_entries (
+        entry_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        student_id INTEGER NOT NULL,
+        teacher_id INTEGER NOT NULL,
+        subject_id INTEGER NOT NULL,
+        room_id INTEGER,
+        timeslot_id INTEGER NOT NULL,
+        academic_year TEXT NOT NULL,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (student_id) REFERENCES students(student_id),
+        FOREIGN KEY (teacher_id) REFERENCES teachers(teacher_id),
+        FOREIGN KEY (subject_id) REFERENCES subjects(subject_id),
+        FOREIGN KEY (room_id) REFERENCES rooms(room_id),
+        FOREIGN KEY (timeslot_id) REFERENCES timeslots(timeslot_id)
+    )
+    ''')
+    
+    # 4. Security System
+    cursor.execute('''
+    CREATE TABLE users (
+        user_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        username TEXT NOT NULL UNIQUE,
+        password_hash TEXT NOT NULL,
+        role TEXT NOT NULL,
+        email TEXT,
+        last_login TIMESTAMP,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE audit_log (
+        log_id INTEGER PRIMARY KEY AUTOINCREMENT,
+        user_id INTEGER,
+        action TEXT NOT NULL,
+        table_name TEXT NOT NULL,
+        record_id INTEGER,
+        old_value TEXT,
+        new_value TEXT,
+        timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (user_id) REFERENCES users(user_id)
+    )
+    ''')
+    
+    # 5. Relationship tables
+    cursor.execute('''
+    CREATE TABLE student_subjects (
+        student_id INTEGER NOT NULL,
+        subject_id INTEGER NOT NULL,
+        PRIMARY KEY (student_id, subject_id),
+        FOREIGN KEY (student_id) REFERENCES students(student_id),
+        FOREIGN KEY (subject_id) REFERENCES subjects(subject_id)
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE student_tech_tracks (
+        student_id INTEGER NOT NULL,
+        track_id INTEGER NOT NULL,
+        PRIMARY KEY (student_id, track_id),
+        FOREIGN KEY (student_id) REFERENCES students(student_id),
+        FOREIGN KEY (track_id) REFERENCES tech_tracks(track_id)
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE student_english_levels (
+        student_id INTEGER NOT NULL,
+        level_id INTEGER NOT NULL,
+        PRIMARY KEY (student_id, level_id),
+        FOREIGN KEY (student_id) REFERENCES students(student_id),
+        FOREIGN KEY (level_id) REFERENCES english_levels(level_id)
+    )
+    ''')
+    
+    cursor.execute('''
+    CREATE TABLE student_groups (
+        student_id INTEGER NOT NULL,
+        group_id INTEGER NOT NULL,
+        PRIMARY KEY (student_id, group_id),
+        FOREIGN KEY (student_id) REFERENCES students(student_id),
+        FOREIGN KEY (group_id) REFERENCES special_groups(group_id)
+    )
+    ''')
+    
+    conn.commit()
+    print("✅ All tables created successfully!")
+    return conn
+
+def insert_dummy_data(conn):
+    """Insert sample data into all tables"""
+    
+    cursor = conn.cursor()
+    
+    # 1. Insert Teachers
+    teachers = [
+        ('Ms. Johnson', 'Mathematics', 'johnson@school.edu', 'MSc Mathematics'),
+        ('Mr. Smith', 'Science', 'smith@school.edu', 'PhD Physics'),
+        ('Ms. Davis', 'English', 'davis@school.edu', 'MA English Literature'),
+        ('Mr. Wilson', 'Technology', 'wilson@school.edu', 'BSc Computer Science'),
+        ('Ms. Garcia', 'Arts', 'garcia@school.edu', 'MFA Visual Arts')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO teachers (full_name, department, email, qualifications)
+    VALUES (?, ?, ?, ?)
+    ''', teachers)
+    
+    # 2. Insert Students
+    students = [
+        ('Alex Chen', '2009-03-15', '4A', '+1-555-0101'),
+        ('Sofia Rodriguez', '2009-07-22', '4A', '+1-555-0102'),
+        ('James Wilson', '2009-01-10', '4B', '+1-555-0103'),
+        ('Maya Patel', '2009-11-30', '4B', '+1-555-0104'),
+        ('Ethan Brown', '2009-05-18', '4C', '+1-555-0105'),
+        ('Isabella Kim', '2009-09-05', '4C', '+1-555-0106')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO students (full_name, date_of_birth, class_group, emergency_contact)
+    VALUES (?, ?, ?, ?)
+    ''', students)
+    
+    # 3. Insert Subjects
+    subjects = [
+        ('Mathematics', 'STEM', 4),
+        ('Physics', 'STEM', 4),
+        ('English Language', 'Languages', 4),
+        ('Computer Science', 'STEM', 3),
+        ('Art', 'Arts', 2),
+        ('Physical Education', 'Sports', 2)
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO subjects (subject_name, department, credits)
+    VALUES (?, ?, ?)
+    ''', subjects)
+    
+    # 4. Insert Rooms
+    rooms = [
+        ('204', 30, 'Projector, Whiteboard'),
+        ('105', 25, 'Lab Equipment, Computers'),
+        ('312', 35, 'Whiteboard, Audio System'),
+        ('101', 20, 'Art Supplies, Easels'),
+        ('Gym', 100, 'Sports Equipment'),
+        ('Library', 50, 'Computers, Books')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO rooms (room_number, capacity, equipment)
+    VALUES (?, ?, ?)
+    ''', rooms)
+    
+    # 5. Insert Classes
+    classes = [
+        ('4A', 1, '2025-2026'),
+        ('4B', 2, '2025-2026'),
+        ('4C', 3, '2025-2026')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO classes (class_name, homeroom_teacher_id, academic_year)
+    VALUES (?, ?, ?)
+    ''', classes)
+    
+    # 6. Insert Tech Tracks
+    tech_tracks = [
+        ('Design & Creativity', 'Graphic design, product design'),
+        ('Culinary Arts', 'Cooking, baking, food science'),
+        ('Industrial Technology', 'Engineering, manufacturing')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO tech_tracks (track_name, description)
+    VALUES (?, ?)
+    ''', tech_tracks)
+    
+    # 7. Insert English Levels
+    english_levels = [
+        ('E1', 'Beginner English'),
+        ('E2', 'Elementary English'),
+        ('E3', 'Pre-Intermediate'),
+        ('E4', 'Intermediate'),
+        ('E5', 'Upper-Intermediate'),
+        ('E6', 'Advanced')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO english_levels (level_code, description)
+    VALUES (?, ?)
+    ''', english_levels)
+    
+    # 8. Insert Special Groups
+    special_groups = [
+        ('Math Olympiad', 'Competition', 1, 15),
+        ('Science Club', 'Club', 2, 20),
+        ('Debate Team', 'Competition', 3, 10),
+        ('Robotics Club', 'Club', 4, 12)
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO special_groups (group_name, group_type, teacher_in_charge_id, max_participants)
+    VALUES (?, ?, ?, ?)
+    ''', special_groups)
+    
+    # 9. Insert Timeslots
+    timeslots = [
+        ('Monday', 1, '08:30', '09:15', 'Module 1'),
+        ('Monday', 2, '09:20', '10:05', 'Module 1'),
+        ('Monday', 3, '10:30', '11:15', 'Module 1'),
+        ('Monday', 4, '11:20', '12:05', 'Module 1'),
+        ('Tuesday', 1, '08:30', '09:15', 'Module 1'),
+        ('Tuesday', 2, '09:20', '10:05', 'Module 1'),
+        ('Wednesday', 1, '08:30', '09:15', 'Module 1'),
+        ('Thursday', 1, '08:30', '09:15', 'Module 1'),
+        ('Friday', 1, '08:30', '09:15', 'Module 1')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO timeslots (day_of_week, period_number, start_time, end_time, academic_module)
+    VALUES (?, ?, ?, ?, ?)
+    ''', timeslots)
+    
+    # 10. Insert Schedule Entries
+    schedule_entries = [
+        (1, 1, 1, 1, 1, '2025-2026'),  # Alex, Ms. Johnson, Math, Room 204, Monday 8:30
+        (2, 2, 3, 2, 2, '2025-2026'),  # Sofia, Mr. Smith, English, Room 105, Monday 9:20
+        (3, 3, 2, 3, 3, '2025-2026'),  # James, Ms. Davis, Physics, Room 312, Monday 10:30
+        (4, 4, 4, 4, 4, '2025-2026'),  # Maya, Mr. Wilson, CS, Room 101, Monday 11:20
+        (5, 5, 5, 5, 5, '2025-2026'),  # Ethan, Ms. Garcia, Art, Gym, Tuesday 8:30
+        (6, 1, 6, 6, 6, '2025-2026')   # Isabella, Ms. Johnson, PE, Library, Tuesday 9:20
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO schedule_entries (student_id, teacher_id, subject_id, room_id, timeslot_id, academic_year)
+    VALUES (?, ?, ?, ?, ?, ?)
+    ''', schedule_entries)
+    
+    # 11. Insert Relationship Data
+    # Student-Subject relationships (students taking multiple subjects)
+    student_subjects = [
+        (1, 1), (1, 2), (1, 3),  # Alex takes Math, Physics, English
+        (2, 1), (2, 4), (2, 5),  # Sofia takes Math, CS, Art
+        (3, 2), (3, 3), (3, 6),  # James takes Physics, English, PE
+        (4, 4), (4, 5), (4, 6),  # Maya takes CS, Art, PE
+        (5, 1), (5, 2), (5, 4),  # Ethan takes Math, Physics, CS
+        (6, 3), (6, 5), (6, 6)   # Isabella takes English, Art, PE
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO student_subjects (student_id, subject_id)
+    VALUES (?, ?)
+    ''', student_subjects)
+    
+    # Student-Tech Track relationships
+    student_tech_tracks = [
+        (1, 1),  # Alex in Design
+        (2, 2),  # Sofia in Culinary
+        (3, 3),  # James in Industrial
+        (4, 1),  # Maya in Design
+        (5, 2),  # Ethan in Culinary
+        (6, 3)   # Isabella in Industrial
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO student_tech_tracks (student_id, track_id)
+    VALUES (?, ?)
+    ''', student_tech_tracks)
+    
+    # Student-English Level relationships
+    student_english_levels = [
+        (1, 4),  # Alex in E4
+        (2, 5),  # Sofia in E5
+        (3, 3),  # James in E3
+        (4, 6),  # Maya in E6
+        (5, 2),  # Ethan in E2
+        (6, 4)   # Isabella in E4
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO student_english_levels (student_id, level_id)
+    VALUES (?, ?)
+    ''', student_english_levels)
+    
+    # Student-Group relationships
+    student_groups = [
+        (1, 1), (1, 3),  # Alex in Math Olympiad & Debate
+        (2, 2), (2, 4),  # Sofia in Science & Robotics
+        (3, 1), (3, 4),  # James in Math Olympiad & Robotics
+        (4, 2), (4, 3),  # Maya in Science & Debate
+        (5, 1),          # Ethan in Math Olympiad
+        (6, 2), (6, 4)   # Isabella in Science & Robotics
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO student_groups (student_id, group_id)
+    VALUES (?, ?)
+    ''', student_groups)
+    
+    # 12. Insert Users
+    users = [
+        ('admin', 'hashed_password_123', 'administrator', 'admin@school.edu'),
+        ('teacher1', 'hashed_password_456', 'teacher', 'johnson@school.edu'),
+        ('teacher2', 'hashed_password_789', 'teacher', 'smith@school.edu'),
+        ('student1', 'hashed_password_abc', 'student', 'alex@school.edu')
+    ]
+    
+    cursor.executemany('''
+    INSERT INTO users (username, password_hash, role, email)
+    VALUES (?, ?, ?, ?)
+    ''', users)
+    
+    conn.commit()
+    print("✅ Dummy data inserted successfully!")
+    
+    # Show table counts
+    tables = ['students', 'teachers', 'subjects', 'rooms', 'classes', 
+              'tech_tracks', 'english_levels', 'special_groups', 
+              'timeslots', 'schedule_entries', 'users']
+    
+    print("\n📊 Database Statistics:")
+    for table in tables:
+        cursor.execute(f"SELECT COUNT(*) FROM {table}")
+        count = cursor.fetchone()[0]
+        print(f"   {table}: {count} records")
+
+def main():
+    """Main function to create database and insert data"""
+    print("🏫 School Schedule Database Setup")
+    print("=" * 40)
+    
+    try:
+        # Create database and tables
+        conn = create_tables()
+        
+        # Insert dummy data
+        insert_dummy_data(conn)
+        
+        # Test queries
+        cursor = conn.cursor()
+        
+        print("\n🔍 Sample Queries:")
+        print("=" * 40)
+        
+        # Query 1: Get student schedule
+        print("\n1. Alex Chen's Schedule:")
+        cursor.execute('''
+        SELECT s.full_name, t.full_name as teacher, sub.subject_name, 
+               r.room_number, ts.day_of_week, ts.start_time, ts.end_time
+        FROM schedule_entries se
+        JOIN students s ON se.student_id = s.student_id
+        JOIN teachers t ON se.teacher_id = t.teacher_id
+        JOIN subjects sub ON se.subject_id = sub.subject_id
+        JOIN rooms r ON se.room_id = r.room_id
+        JOIN timeslots ts ON se.timeslot_id = ts.timeslot_id
+        WHERE s.full_name = 'Alex Chen'
+        ORDER BY ts.day_of_week, ts.start_time
+        ''')
+        
+        for row in cursor.fetchall():
+            print(f"   {row[0]} has {row[2]} with {row[1]} in Room {row[3]} on {row[4]} {row[5]}-{row[6]}")
+        
+        # Query 2: Count students in each group
+        print("\n2. Group Participation:")
+        cursor.execute('''
+        SELECT sg.group_name, COUNT(sg.student_id) as student_count
+        FROM student_groups sg
+        JOIN special_groups g ON sg.group_id = g.group_id
+        GROUP BY g.group_name
+        ORDER BY student_count DESC
+        ''')
+        
+        for row in cursor.fetchall():
+            print(f"   {row[0]}: {row[1]} students")
+        
+        # Query 3: Find available rooms at a specific time
+        print("\n3. Room 204 Schedule on Monday:")
+        cursor.execute('''
+        SELECT ts.start_time, ts.end_time, t.full_name as teacher, 
+               s.full_name as student, sub.subject_name
+        FROM schedule_entries se
+        JOIN timeslots ts ON se.timeslot_id = ts.timeslot_id
+        JOIN teachers t ON se.teacher_id = t.teacher_id
+        JOIN students s ON se.student_id = s.student_id
+        JOIN subjects sub ON se.subject_id = sub.subject_id
+        JOIN rooms r ON se.room_id = r.room_id
+        WHERE r.room_number = '204' AND ts.day_of_week = 'Monday'
+        ORDER BY ts.start_time
+        ''')
+        
+        for row in cursor.fetchall():
+            print(f"   {row[0]}-{row[1]}: {row[2]} teaching {row[4]} to {row[3]}")
+        
+        # Save SQL file
+        print("\n💾 Exporting SQL statements to 'database_setup.sql'...")
+        with open('database_setup.sql', 'w') as f:
+            # Get schema
+            cursor.execute("SELECT sql FROM sqlite_master WHERE type='table'")
+            for row in cursor.fetchall():
+                f.write(row[0] + ";\n\n")
+            
+            # Get data (simplified)
+            f.write("-- Sample INSERT statements would go here\n")
+        
+        print("✅ Database setup complete!")
+        print(f"📁 Database file: school_schedule.db")
+        print(f"📄 SQL file: database_setup.sql")
+        
+        conn.close()
+        
+    except Exception as e:
+        print(f"❌ Error: {e}")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file
diff --git a/g10-m3-5/database_setup.sql b/g10-m3-5/database_setup.sql
new file mode 100644
index 0000000..75d4d31
--- /dev/null
+++ b/g10-m3-5/database_setup.sql
@@ -0,0 +1,162 @@
+-- database_setup.sql
+-- Core Tables Creation
+
+-- 1. Students Table
+CREATE TABLE students (
+    student_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    full_name TEXT NOT NULL,
+    date_of_birth DATE,
+    class_group TEXT,
+    emergency_contact TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 2. Teachers Table
+CREATE TABLE teachers (
+    teacher_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    full_name TEXT NOT NULL,
+    department TEXT,
+    email TEXT,
+    qualifications TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 3. Subjects Table
+CREATE TABLE subjects (
+    subject_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    subject_name TEXT NOT NULL,
+    department TEXT,
+    credits INTEGER,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 4. Rooms Table
+CREATE TABLE rooms (
+    room_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    room_number TEXT NOT NULL,
+    capacity INTEGER,
+    equipment TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 5. Classes Table
+CREATE TABLE classes (
+    class_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    class_name TEXT NOT NULL,
+    homeroom_teacher_id INTEGER,
+    academic_year TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (homeroom_teacher_id) REFERENCES teachers(teacher_id)
+);
+
+-- 6. Tech Tracks Table
+CREATE TABLE tech_tracks (
+    track_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    track_name TEXT NOT NULL,
+    description TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 7. English Levels Table
+CREATE TABLE english_levels (
+    level_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    level_code TEXT NOT NULL,
+    description TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 8. Special Groups Table
+CREATE TABLE special_groups (
+    group_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    group_name TEXT NOT NULL,
+    group_type TEXT,
+    teacher_in_charge_id INTEGER,
+    max_participants INTEGER,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (teacher_in_charge_id) REFERENCES teachers(teacher_id)
+);
+
+-- 9. Timeslots Table
+CREATE TABLE timeslots (
+    timeslot_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    day_of_week TEXT NOT NULL,
+    period_number INTEGER,
+    start_time TIME NOT NULL,
+    end_time TIME NOT NULL,
+    academic_module TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 10. Schedule Entries Table (Core Connection Table)
+CREATE TABLE schedule_entries (
+    entry_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    student_id INTEGER NOT NULL,
+    teacher_id INTEGER NOT NULL,
+    subject_id INTEGER NOT NULL,
+    room_id INTEGER,
+    timeslot_id INTEGER NOT NULL,
+    academic_year TEXT NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (student_id) REFERENCES students(student_id),
+    FOREIGN KEY (teacher_id) REFERENCES teachers(teacher_id),
+    FOREIGN KEY (subject_id) REFERENCES subjects(subject_id),
+    FOREIGN KEY (room_id) REFERENCES rooms(room_id),
+    FOREIGN KEY (timeslot_id) REFERENCES timeslots(timeslot_id)
+);
+
+-- 11. Users Table (Security)
+CREATE TABLE users (
+    user_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL UNIQUE,
+    password_hash TEXT NOT NULL,
+    role TEXT NOT NULL,
+    email TEXT,
+    last_login TIMESTAMP,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 12. Audit Log Table
+CREATE TABLE audit_log (
+    log_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id INTEGER,
+    action TEXT NOT NULL,
+    table_name TEXT NOT NULL,
+    record_id INTEGER,
+    old_value TEXT,
+    new_value TEXT,
+    timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(user_id)
+);
+
+-- 13. Relationship Tables
+CREATE TABLE student_subjects (
+    student_id INTEGER NOT NULL,
+    subject_id INTEGER NOT NULL,
+    PRIMARY KEY (student_id, subject_id),
+    FOREIGN KEY (student_id) REFERENCES students(student_id),
+    FOREIGN KEY (subject_id) REFERENCES subjects(subject_id)
+);
+
+CREATE TABLE student_tech_tracks (
+    student_id INTEGER NOT NULL,
+    track_id INTEGER NOT NULL,
+    PRIMARY KEY (student_id, track_id),
+    FOREIGN KEY (student_id) REFERENCES students(student_id),
+    FOREIGN KEY (track_id) REFERENCES tech_tracks(track_id)
+);
+
+CREATE TABLE student_english_levels (
+    student_id INTEGER NOT NULL,
+    level_id INTEGER NOT NULL,
+    PRIMARY KEY (student_id, level_id),
+    FOREIGN KEY (student_id) REFERENCES students(student_id),
+    FOREIGN KEY (level_id) REFERENCES english_levels(level_id)
+);
+
+CREATE TABLE student_groups (
+    student_id INTEGER NOT NULL,
+    group_id INTEGER NOT NULL,
+    PRIMARY KEY (student_id, group_id),
+    FOREIGN KEY (student_id) REFERENCES students(student_id),
+    FOREIGN KEY (group_id) REFERENCES special_groups(group_id)
+);
\ No newline at end of file
diff --git a/g10-m3-5/school_schedule.db b/g10-m3-5/school_schedule.db
new file mode 100644
index 0000000..0a63738
Binary files /dev/null and b/g10-m3-5/school_schedule.db differ