diagram.plantuml

@startuml High School

class Member {
  +first_name: String
  +last_name: String
}

class Professor {
}

class Assistant {
}

class Student {
  +option: String
}

Member <|-- Professor
Member <|-- Assistant
Member <|-- Student


class Subject {
  +name: String
}

Professor "2..*" -- "*" Subject : expert in >

class Expertise {
  +level: Integer
}

Assistant "*" -- "*" Subject : knows >
(Assistant, Subject) . Expertise

class Institute {
  +name: String
}

Professor "*" -- "1" Institute : works for >

class Course {
}

Course "*" -- "1" Subject : covers >
Professor "1" -- "*" Course : teaches >
Assistant "0..3" -- "*" Course : supervises >
Student "5..*" -- "*" Course : follows >

@enduml