Wow. No apologies from me for caring about art and about the difference between poetry and prose.
Your son's teacher seems to have focused on the old-fashioned, superficial features of poetry (the rhyming), whereas I say explicitly that these days, real poems just have to be highly creative in their use of language. Rhyming, rhythm, and the other formalities are no longer essential. So your comparison seems a weak one.
I note also that your comment is purely ad hominem and some kind of attempt at a guilt trip. But the question before you is where my article goes wrong. What is the difference between prose and poetry such that Gorman's "The Hill We Climb" counts as a poem?