Backus & Barden 
Westward Expansion and Migration, Grades 6 — 12 [PDF ebook] 

Bring history to life for students in grades 6-12 using Westward Expansion and Migration. This 128-page book is perfect for independent study or use as a tutorial aid. It explores history, geography, and social studies with activities that involve critical thinking, writing, and technology. The book includes topics such as Lewis and Clark, the Santa Fe Trail, the Gold Rush, and San Francisco. It also includes vocabulary words, time lines, maps, and reading lists. The book supports NCSS standards and aligns with state, national, and Canadian provincial standards.