Necla Kelek received her doctorate with an investigation of "Islamische Religiosität und ihre Bedeutung in der Lebenswelt von Schülerinnen und Schülern türkischer Herkunft" (Islamic religiosity and its importance in the lives of schoolchildren of Turkish background), which appeared as a book in 2002 under the title of "Islam im Alltag" (Islam in Everyday Life). At that time, she came to the conclusion that schoolchildren individually learn Islam, adapt it to their needs, and use it to form their identity. Their Islamic religiousness is not a hindrance to integration, but, rather, an example of cultural change.