Sudden Stop!

In class we have looked at pictures about "The Enemy" and "Women" as depicted in propaganda from WWII. My question is why do we spend so much time on each picture? What person will stop and look at a propaganda poster as closely as we did and stare at it for the amount of time we did while they walk down the street? I know for sure that most of our class wouldn't. I'm not sure about Mr. Bolos though. I could see him having his kids stare at a poster for a period of time and tell him everything they see in the poster. I'm just thinking if we should use that time to study Huck Finn or something else in that time period.