High School Resource History of Thanksgiving by History.com This video, from History.com’s archives, focuses on the history of Thanksgiving and how it became a holiday. Related NY State Academic Standards: SS.5.3, SS.5.3.b, SS.5.3.b.1, and more! Be sure to check out our Educational Resources, featuring thousands of activities, lesson plans, constructed-response questions, rubrics, teacher resources, multimedia, […]