In the Library: 917 (geography), 970 (history)
In the Library: 915 (geography), 950 (history)
In the Library: 919 (geography), 998 (history)
In the Library: 914 (geography), 940 (history)
In the Library: 916 (geography), 960 (history)
In the Library: 919 (geography), 994 (history)
In the Library: 918 (geography), 980 (history)
In the Library: 912.01
Online: Harcourt School: the World
In the Library: 577
Folkways Recordings by the Smithsonian: result page for lesson plans about musical genres from the United States (switch "Content Type" to explore Playlists, Videos, Tracks, Albums, or Articles).
Music Map has cool graphics showing different genres, split into subgenres (might be too much there), but also playlists.
PBS also has some videos that might be of interest, including that one on rural folk music.
I will include one of my Top 3 songs ever, "The Man I Love" from the album "Gershwin Live!", a collaboration between famed jazz singer Sarah Vaughan and the Los Angeles Philharmonic (classical music, obviously). The first part of the song is very classical, while the second part uses upbeat jazz.
You can drive the point home with a video like this one, where one song is sung in many different genres.
Use this interactive website that brings songs played on the radio, for any country, in any decade from 1900 to now; or this cool map, which marries U.S. geography and musical genres.
Check out the Whitney Museum of American Art website and the Smithsonian American Art Museum website
The National Gallery of Art has resources for teachers along with their collection
Explore museums from around the world through Google's "Explore"
Encyclopedia of Art History has tons of links to paintings and artists; and The Art Story has choice picks to represent major trends.
Videos like The evolution of dance -1950 to 2019, or Evolution of dance (1920s-2000s) quickly introduce students to many different genres, in chronological order.
#WorldBalletDay will bring up videos of professional ballet companies rehearsing and/or performing.
Games like Scattergories or Apples to Apples will bring out the differences in people, and get them to talk to one another, with a lot less judgement than might be present in everyday conversation.
National Veterans Wheelchair games - The Top 10 Most Popular Sports in America - The United Sports of America (if each state could have only one sport, what would it be?)