Here is a US History Curriculum for younger students (ideal for grades 1-3). It is designed as a 5 part unit - covering Native Americans, European Settlers, the 13 Colonies, The Oregon Trail, and the Transcontinental Railroad. There are 16 picture cards that can be used for matching, memory games, or teaching lessons. This packet also includes a coloring sheet and a matching worksheet.
Hope it is helpful to you, your feedback is appreciated!