This document provides vocabulary terms and concepts related to Native American tribes and their economies and governments. It defines words like surplus, specialize, economy, interact, and barter. It discusses how Native American tribes in different regions like the Eastern Woodlands and Desert Southwest specialized and used bartering and economies. It also explains that many Native American tribes had their own systems of government and leaders, similar to governments today, and discusses how the Iroquois Confederacy was formed through cooperation and a council to discuss land, trade, and war.