Here are two context clues worksheets on de facto and de jure. Both terms are used as adverbs and adjectives. I would argue that these are two terms that represent conceptual understanding students really ought to have upon high school graduation.
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.