Periodization - think about how we group periods in time
{"Image DocumentName": "Periodization - think about how we group periods in time", "Image ImageDescription": "1920\u2019s vs 1930\u2019s.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}