Here is a context clues worksheet on the noun tier, which is a word students should know by the time they leave high school. This is a very common noun in educated discourse, in which I want the students I serve to participate. It means, on this worksheet, layer. This word, to my mild surprise, also has use as a verb.
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.