Teacher/Students Course managment system

The project is about building a simple system for college course management, in PHP/mySQL. System will have 3 types of users: 1) System administrator - Would be able to create/edit/remove users and assign them roles and courses. 2) Teacher - Will have the ability to edit course posts. 3) Student - Will be able to view his courses. Each course will have 3 parts: General Info - FCKEditor part. Announcments - Title, Date/Time, Detail (text with the ability to link to files/external links) File area - Title, Date/Time, File (pdf,ppt,doc, images etc). The teacher interface needs to be very simple with those 3 parts and allow easy upload for the file area. The student interface - will have a list of his courses on the right. In the middle part will have 3 tabs for each area(general info,announcements,file area) The system will be in hebrew: - needs to be designed for right-to-left. - all captions should be variable based and kept in an language include file/database so I can easily translate. Design: Should be something very simple but elegant. Code: Needs to be documented and clear.