Make 2 UML diagram for online school and a freelance software....
[login to view URL] school with certificate and coarses in several field.
2. A software like freelancer where you can upload project or jobs and people can complete it.
3 фрилансеров(-а) в среднем готовы выполнить эту работу за $25
I just made UML diagrams for my recent projects. I think I can deliver what you want with high confidence that it will comply with the standard requirements.