Nina,
I understand you don’t want to waste. Do you have a used bookstore you could make consignment with?
Other than that, since I haven’t looked at TWTM’s Lessons, I could make a guess on a couple of uses for you. One, you could just wait till next year to use it since I think the material may be just right come 8 or 9?
Otherwise, you could try to use most of it orally, if possible, and skip the diagramming on paper, just discuss and identify and move on. Definitely keep the writing to a minimum, ask her questions from the lesson and have her answer orally. I don’t know if it’s set up as fill in the blank, but if it’s fill in the blank, she could read the sentence aloud and then choose the correct word to fill in for the proper sentence structure. Shouldn’t take long to implement, maybe 5, 10 min. max. done orally.
Just a guess…get creative in application, sell it, trade it or hold it for later.
Sorry I couldn’t be more helpful, Rachel