Political map of the world for grades 4-12. National Geographic's graded-series of maps are the first to address the unique needs of K-12 students as they advance their understanding of our World. Unlike other classroom poster maps, the world maps use the Winkel-Triple projection, which provides the best combination of size, shape, and distance giving the student the best visual representation of the Earth's surface in two dimensions. This solves the effect seen on other maps where Greenland appears larger than South America. Our Political Series, grades 4-12, has up-to-date World and U.S. maps, increasing the detail of information for the teacher and student to utilize. Map Scale = 1:32,970,000 - Sheet Size = 51" x 40" Founded in 1915 as the Cartographic Group, the first division of National Geographic, National Geographic Maps has been responsible for illustrating the world around us through the art and science of mapmaking.Today, National Geographic Maps continues this mission by creating the world's best wall maps, recreation maps, atlases, and globes which inspire people to care about and explore their world.