Stock Photo - 19 February 2021, North Rhine-Westphalia, Duesseldorf: Student and bestselling author Tim Nießner sits on a beanbag with his new book ""Der Zeugnisretter"". Nießner from Haan near Düsseldorf has systematically researched the strategies of Germany's best students. In his book he has thereby a quantity of Tipps for bad pupils. (to dpa ""Operation Zeugnisrettung: Wie schlechte Schüler die Kurve kriegen"") Photo: Fabian Strauch/dpa. - Duesseldorf/North Rhine-Westphalia/Germany

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