Cinco De Mayo This four minute video from History.com’s archives focuses on the real reason Mexican’s celebrate Cinco de Mayo. Related NY State Academic Standards: SS.3.TCC.4, SS.3.MOV.5.b, SS.3.MOV.5.b.2 and more! Be sure to check out our Educational Resources, featuring thousands of activities, lesson plans, constructed-response questions, rubrics, teacher resources, multimedia, and more!