There has been an explosion of great apps for learning about the states. Many are fun and challenging. Just like the math apps have done for learning the multiplication tables. These apps make learning your states easier and much more fun.
50 States gives students a blank map of the US and they must place the state in the proper location. Very challenging.
The States quizzes students flash card style. Given three state maps, they must choose the correct one. You can also practice the state capitals.
U.S. States gives information about the states in a database like format. Information includes the flag, quarter and other symbols in addition to the facts. The map feature gives a map view like the built in map app.
SSStates similar to the above, this app gives the basic facts in a very simple format. This is one of the first state apps that was created.