Sam says to check out the updated publications on the Humanity in Action site
Lots of great publications and relevant to your topics, such as:
Neaka, Corey, and Steffen's report
"Integration Through Recreation: The Role of Youth Soccer in Multicultural Berlin"
Also Anika, Sarah, and Alli's report
"Beyond Stereotypes: How Artists of Turkish Descent Deal with Identity in Germany."
You'll also find Sam's report as the last one among the German reports.