Think “fifty nifty United States” (50 states in alphabetical order).
Songs that teaches the states in some sort of geographical order, or the states with their capitals, like the ones by kathy troxel and the audio memory states and capitals CD.
Songs that teaches other countries and capitals. Larry & Kathy Toxel have another CD that sings about countries around the world
Naming the 206 bones in the body.
Naming presidents.
The periodic table.
Etc.