It is not idiomatic "to give" a class. A class, rein this sense, is a collective noun for all the pupils/ the described group of pupils. "Ur class went to the zoo." Während Westbam heute weniger aktiv ist, kann man Sven Väth immer noch in der Disco Watergate rein Berlin https://milohouzf.tkzblog.com/33571386/eine-geheimwaffe-für-rhythm