This worksheet on the Greek roots nom-o and nomy can, if necessary, familiarize your students with this very productive root in English, particularly in the world of teaching and learning; it means law, system of laws, management, and rule. Taxonomy obviously grows from this root, and it is just as obviously a word learners really ought to know.
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.