As I think these are two locutions high school students should understand and be able to use properly before they graduate, here is an English usage worksheet on differentiating the use of subject to and subjected to in declarative sentences and expository prose.
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.