It has been some time since Merriam-Webster has posted of the Word of the Day that I though high school students must know. For example, today’s word is repine, an intransitive verb meaning “to feel or express dejection or discontent.” My guess, unless you plan to have your students reading or writing on Victorian literature, or unless you seek to have them assume literary pretentiousness in common discourse, they won’t need to know this verb.
Yesterday produced, after several dry days, this context clues worksheet on the noun emissary. This is, I think, a word in common enough use that students will need to know it in high school, particularly in social studies courses.
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.