Here is a Cultural Literacy worksheet on the concept of ego. This is a half-page worksheet; the reading is three sentences, though two of them are longish compounds, and there are three comprehension questions.
This is a concept students should understand. The virtue of the reading in this document is that it situates the ego in Freud’s structural theory of mind, (without, interestingly, ever mentioning Sigmund Freud himself) so students will also learn about the id and the superego. This is a good general introduction to this subject. That said, there is clearly room to expand this document (easy for you to accomplish, since like everything on Mark’s Text Terminal, this is a Microsoft Word document) for further exploration or exposition of psychoanalytic theory. If I were to expand this in any way, I would make sure students walked away with a basic understanding of Freud’s biography and his ideas about the psyche.
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.