Set in a boarding school famous for its choir, this benign but extremely boring 2002 German feature is like Harry Potter minus the magic. An eccentric principal and a wise choirmaster oversee a clutch of boy sopranos who engage in episodic high jinks—pillow fights, snowball fights, sassing authority figures, etc—before uniting with their erstwhile enemies, the “day kids” (i.e., nonboarding students) to produce a hip-hop Christmas pageant called “The Flying Classroom.” Most of this is no worse than a prolonged after-school special, but the rap and break-dance numbers border on child abuse. Tomy Wigan directed. In German with subtitles. 114 min.