## Students

id | name | age
--- | --- | ---
1 | Alice | 20
2 | Bob | 23
3 | Charlie | 21
4 | Diana | 22
5 | Evan | 24

## Core_Concepts

concept_id | concept_name | description
--- | --- | ---
1 | Python Programming | A high-level programming language
2 | Linear Algebra | The study of vector spaces and linear mappings between them
3 | Calculus | The study of change and motion

## Advanced_Topics

topic_id | topic_name | difficulty
--- | --- | ---
1 | Advanced Python | Intermediate
2 | Multivariable Calculus | Advanced
3 | Tensor Analysis | Expert

## School_Subjects

subject_id | subject_name | core_concept_id | advanced_topic_id
--- | --- | --- | ---
|  | (→ Core_Concepts.concept_id) | (→ Advanced_Topics.topic_id)
1 | Introduction to Python | 1 | 1
2 | Linear Algebra Applications | 2 | None
3 | Single Variable Calculus | 3 | 2
4 | Multivariable Calculus Theory | 3 | 3
5 | Tensor Methods in Physics | 4 | 4

## EnrolledStudents

enrollment_id | student_id | subject_id | grade
--- | --- | --- | ---
| (→ Students.id) | (→ School_Subjects.subject_id) |
1 | 1 | 1 | 87.6
2 | 2 | 2 | 92.1
3 | 3 | 3 | 81.5
4 | 4 | 4 | 79.3
5 | 5 | 5 | 98.5