Check out Editing Practice by rogersgeorge. Here is an excerpt:
Another easy post for me, but hard for you, I think. How would you edit this sentence? It’s from the November 14, 2017 Mr. Fitz comic:
Beware! If you go to the Mr. Fitz site, you will spend more time there than you intend. Especially if you’re a teacher.
The full article is available here.