Here is a Cultural Literacy worksheet on the Incas. This is a half-page worksheet with a three-sentence reading and three comprehension questions. Therefore, it is the most basic introduction to a complicated civilization–which I assume most schools at least take a couple days in a world history or global studies class to pore over.
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.