This is a lesson plan for Eve Bunting's, "Whales Passing." The compresion skill is to identify key details in order to summarize and formulate an idea of the theme. It has a coordinating graphic organizer and ideas for extension activities to use in other stations. I identified it as meeting a 4th grade Common Core standard, but I'm sure this skill meets other grade levels as well. It's just a matter of what level of group you are working with for that guided reading session.