An episode of The Engines of Our Ingenuity explores the history of correspondence schools. Episode 3404 examines the rise and fall of ICS, also known as The International Correspondence School. The episode is also referred to as being about International Correspondence Schools.

Further information about the topic can be found in this episode. The episode number is 3404, and it provides insight into the story of ICS. Details about the episode's content are limited, but it is available as part of The Engines of Our Ingenuity series.