This slideshow contains the essential concepts more rooted in the historical developments of APUSH 6.2 + 6.3 Westward Expansion: Economic Development + Social and Cultural Development that briefly explains concepts for APUSH students. This could work for an on level US History course as well! Hope this saves you some time! I paired this two-day lesson with the 6.2/6.3 Scavenger Hunt/Stations also on my tpt page.