Simplified Class Diagram:
This version focuses on the core entities:
```plantuml
@startuml
class Student {
- studentID : int
- name : String
- address : String
- gradeLevel : int
}
class Teacher {
- teacherID : int
- name : String
- subject : String
}
class Course {
- courseID : int
- courseName : String
- teacher : Teacher
}
class Enrollment {
- student : Student
- course : Course
- grade : String
}
Student "1" -- "*" Enrollment : enrolls in
Course "1" -- "*" Enrollment : includes
Teacher "1" -- "*" Course : teaches
@enduml
```
Explanation:
* Student: Represents a student with an ID, name, address, and grade level.
* Teacher: Represents a teacher with an ID, name, and the subject they teach.
* Course: Represents a course with an ID, name, and the teacher who teaches it.
* Enrollment: A linking class showing the relationship between students and courses. It includes the grade received by the student.
More Detailed Class Diagram:
This version adds more attributes and relationships:
```plantuml
@startuml
class Student {
- studentID : int
- name : String
- address : String
- phone : String
- dateOfBirth : Date
- gradeLevel : int
- email : String
}
class Teacher {
- teacherID : int
- name : String
- subject : String
- department : String
- phone : String
- email : String
}
class Course {
- courseID : int
- courseName : String
- description : String
- credits : int
- teacher : Teacher
}
class Enrollment {
- student : Student
- course : Course
- grade : String
- semester : String
- year : int
}
class Department {
- departmentID : int
- name : String
}
Student "1" -- "*" Enrollment : enrolls in
Course "1" -- "*" Enrollment : includes
Teacher "1" -- "*" Course : teaches
Teacher "1" -- "1" Department : belongs to
@enduml
```
Explanation of Additions:
* Department: Added to group teachers and potentially courses.
* More attributes: Added phone numbers, emails, semester and year to `Enrollment`, and more details to other classes for a more realistic representation.
Even More Complex Diagram (Example):
You could further extend this to include:
* Parent: Information about student's parents/guardians.
* Payment: Information about tuition fees and payments.
* Assignment: Assignments given in courses.
* GradeBook: A more sophisticated way to manage grades (possibly using a separate class for each assignment).
* Administrator: A user role for managing the system.
Remember to choose the level of detail appropriate for your needs. Start simple and add complexity as required. The PlantUML code above can be copied and pasted directly into a PlantUML editor to generate a visual diagram. You'll need to adjust the diagram based on the specific requirements of your school information system.