Mashup (Here’s one interesting example integrating some basic information on American presidents and their geographic positioning based on place of birth) with seems to be a very fun and intriguing activity to perform but an issue that occurs repeatedly online is the high possibility of incorrect data being provided. Unless, of course, the teachers themselves and/or curriculum programs create the maps themselves then this problem can be better avoided. But the idea of using this activity works very similarly to the web forums on serendip for the purpose of allowing students to contribute their different interests to the class.