The schoolteacher-wolf is depicted as a Confederate sympathizer; he encourages his students to paint a Confederate flag. However, his "theme song," which he whistles several times in the short, is Henry Clay Work's "Kingdom Coming" (1862), an anti-Confederate song, celebrating the impending end of slavery in America. (This may be a deliberate joke by the filmmakers, because the dimwitted protagonist may not realize this.)
The only "Droopy" cartoon not to star or feature Droopy.
Included as a special feature on the Blackboard Jungle (1955) DVD released in 2005 by Warner Home Video.