Here is a Cultural Literacy worksheet on socioeconomic status. This is a half-page worksheet with a three-sentence reading and three comprehension questions. For a document this concise, this is a thorough introduction to the topic. A good start on a complex, entrenched, sociological phenomenon.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.