PJ Creek was teaching social studies and science in middle school. He always referenced his periodic table poster on the wall, but didn't have anything similar to help with social studies. His problem lead to creating the Periodic Table of the Presidents, a poster that shows information about the presidents in a periodic table shape and style. That poster lead to more great infographics on topics like the Amendments, National Parks, the Constitution, the Pledge of Allegiance, and more! ...