OK, here is a worksheet on the Latin word roots lud and lus; they mean, interestingly, to play. These roots produce words in English like allude, collude, delude, and prelude. In other words, what’s at play when using these words is human understanding and consciousness. I’ve never used this in the classroom. As you can see, there is a big linguistic and imaginative leap needed to get to the meaning of these roots–and indeed the words themselves, which represent advanced acts of understanding.
Use cautiously and with a great deal of support, I counsel.
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.