Factual error: In the chemistry lesson on alcoholic fermentation there is written on the blackboard: H6P5O11 -> cane sugar, which is plain nonsense. (00:34:00)
Continuity mistake: Ackermann is asked to write names and biodata of important German writers on the blackboard when Pfeiffer enters the classroom late because of a fake toothache. When the camera is back on Ackermann he has completed the task in a fraction of the time he would have actually needed. (01:08:55)
Continuity mistake: When Pfeiffer and Knebel look through a fence at the effects of their putting up a signboard "School closed for repairs" the bars are different depending on the camera angle. (00:45:00)
Suggested correction: This is not true - the camera angles represent the view of Pfeiffer and Knebel from behind the fence.
Continuity mistake: In the opening scene one of Pfeiffer's friends raises his glass for a toast on his old teacher, and it contains a lot more punch than he put into it. (00:01:15)
Revealing mistake: When Knebel draws a nude on the blackboard you see thin lines that help him complete the drawing. (01:07:40)
