Using the novel, A Game of Thrones, I use this activity of locating the clues in the text to guess who Jon Snow's parents are to teach foreshadowing. In the zip file are the Pages & PDF files. They are not worksheets, more like the teacher's guide when using this type of scavenger hunt with the students. There is a blank diagram for the students to write their clues in. You can tailor this to your desire. I include the story of Rhaegar & Lyanna by text, or by showing them a slide show presentation of their story (I included the link to that slide show in which I created myself). Instructions are included, as well as an example of student work.
I spent 2 days with my class on this activity.
The number of slides include the pdf & the presentation of Rhaegar & Lyanna