This six-sentence reading in this Cultural Literacy worksheet on South Korea does a very nice job of summarizing the last seventy-five or so years of South Korean history. The six comprehension questions, which I wrote, are up for your judgment.
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.