XPaths

At first you have to be on https://isis.tu-berlin.de/my/index.php?mynumber=-2

That site shows all your courses.

##XPaths to Courses Be on your main page.
Course-List: "//[contains(concat(' ', @class, ' '), 'course_list')]"
All courses from Course-List: ".//[contains(@id,'course')]"

Now find the only a element and get the attribute title and href for the course title and link.

##Xpaths to weeks and files Be on the course page.
Week-List: '//*[@id="main"]/div/div/ul'
Weeks from Week-List: "//li"

To be continued....