This book of enrichment materials is an interdisciplinary study of soil designed for students in grades 6-9. The materials are presented in three units. Unit 1 contains eight activities in which students investigate soil science and study the social impact of soil by examining the history of land use by local Native Americans. Unit 2 contains 10 activities in which students examine soil erosion and soil conservation. Unit 3 contains six activities that examine six issues in soil conservation. Each activity is accompanied by a corresponding ditto master for student handouts and contains background information, a list of objectives, and a list of needed supplies. A list of 19 additional resources arranged by unit is provided. Four transparencies illustrating a soil ecosystem, a soil profile, a soil map, and a land use planning map for use in Units 1 and 2 are included.