"New American Streamline combines natural language, everyday situations, and extensive practice of all four skills to give students a practical command of simple, spoken American English. The three levels of "New American Streamline (Departures, Connections, and Destinations) can be used as independent texts or sequentially as parts of a series. Split Editions of the "Student Books are ideal for shorter courses. Part A of each "Student Book covers Units 1-40 Part B covers Units 41-80.