View Spread The Oregon Trail Landmark Events in American History RL Grades 5-8 IL Grades 5-12+ GRL R Details: Product type: Paperback Book 6-Pack ISBN: 978-0-8368-5414-5 Author: Michael V. Uschan Copyright: 2004 Reading Level: Grades 5-8 Interest Level: Grades 5-12+ GRL: R Lexile: 720L Dimensions: 7 3/4" x 10" Paperback Book — $15.05 / $12.80 6-Pack — $90.30 / $76.80