This item is consumable. These extra timeline pages are meant to be added to the Book of Centuries for the U.S. History II year of high school.
Note: Each student needs his/her own Book of Centuries. This is a one-time purchase, as students keep the same Book of Centuries throughout all the high school years. If you have already purchased the Book of Centuries for use with the World Geography guide, or with the World History guide, or with the U.S. History I guide then you will only need the extra timeline pages.