Reading comprehension on Western Expansion. This resource includes multiple choice questions, a written response, and answer key. This reading includes reference to the Louisiana Purchase, Manifest Destiny , and the effects of Western Expansion.. This should be used as an introduction to a Western Expansion unit. It is an information text aligned to multiple CCSS.ELA-LITERACY standards. Students will have to use prior knowledge in order to infer properly. Could be used for grades 3-6.