We have several sets of badges that we call "badge groups" around themes like Marine Life, Around the World, Black History, STEAM, Back to School, and more. Those badge groups are available to you, and you may access them when setting up challenges on your site or in our challenge materials section.
Within your site, when you click on the name of a badge group, you will only see badges available within that group. Typically, when we add a new set available to any library or school, we will add the badge group to all sites.