# Create a classroom dictionary
classroom = {
    'student_1': {
        'name': 'Alice',
        'age': 15,
        'grades': [90, 85, 92]
    },
    'student_2': {
        'name': 'Bob',
        'age': 16,
        'grades': [80, 75, 88]
    },
    'student_3': {
        'name': 'Charlie',
        'age': 14,
        'grades': [95, 92, 98]
    }