This story appears in the November 2013 issue of National Geographic magazine ... and William Clark on their epic journey across North America. The other one is just beginning.

Locate them using a large map. Share any holiday photographs from pupils who have visited countries in North America such as ... and phrases as well as build geographical vocabulary._ ...

North America is the third largest continent in the world. It is located in the Northern Hemisphere. The north of the continent is within the Arctic Circle and the Tropic of Cancer passes through ...