Flagging strategies for reading comprehension. They put the flags directly into the book while reading. I'd also keep a notebook (like the picture suggests) so I could note key words to help me remember why I put the flag where I did.
Close reading is a big part of the Common Core and an important skill to master. This freebie includes a close reading poster, 3 graphic organizers (one for each read), and a set of 6 "Talk Time" discussion prompt cards.