The product is a set of comprehension cards focused on the subject area of regional history, specifically related to Westward Expansion. Created by author Lakeshore, these cards are designed for students in grades 4-5 to help them better understand and engage with historical concepts related to the westward expansion of the United States. The format of the cards makes it easy for students to review and test their knowledge of the subject matter, providing a valuable educational tool for history students.