Here is a context clues worksheet on the noun treatise. It’s not a word anybody uses much these days, but it turned up enough times in the global studies courses I co-taught in New York City that I wrote this worksheet to help students develop their own understanding of its meaning.
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.