Here is a Cultural Literacy worksheet on Attila the Hun. This is a half-page worksheet with a three-sentence reading and three comprehension questions. This is a good general introduction to Attila, but to appreciate fully the wide swath he cut through history, and the consequences of it, you will probably need to dig a little deeper than this document does.
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.