- Id
- Name
- Personal HP
- Office Hp
- Company
- Address
- Contact Id
- When
- Source
- Follow By
- Status
- Pax of Student
- Chinese Level
- Details
- Name
- Hours
- minimal number of students
- maximum number of students
- target level
- details
- number of classes
- Id
- Contact Id
- Comments
- Id
- Contact Id
- student id
- when
- updates
- Lesson Id
- Comments
- Listener Id
- Id
- Course Id
- Teacher Id
- start time
- Id
- Room Name
- Address
- Id
- Class Id
- hours
- when
- when end
- Room id
- Address (Contact Id) // this is for one 2 one lesson
- lesson type (trial lesson, make up, normal, one 2 one)
- Teacher ID
- Cancelled?
- Status (planned, cancelled, taught)
- Student Id
- Lesson Id
- state ( attended, missed)
- reason
- Feedback