Book excerpt: Winding through purple mountains majesties and amber waves of grain, the standards-based Spectrum Geography: Regions of the U.S.A. for grade 4 guides your childÕs understanding of maps, regions, canals, tributaries, and more using colorful illustrations and informational text. --Spectrum Geography is an engaging geography resource that goes beyond land formations and mapsÑit opens up childrenÕs perspectives through local, national, and global adventures without leaving their seats.