This document discusses maps and map projections used in history classrooms. It begins by explaining the issues with using the Mercator projection map, such as its distortion of land sizes farther from the equator. Greenland appears much larger than Africa on the Mercator map, even though Africa is actually 14 times larger than Greenland. The document then introduces the Peters projection map as an alternative equal-area map that shows all areas and continents proportionate to their actual sizes. It provides details on the key characteristics of the Peters projection map and compares it to the Mercator projection map.