Eight complete bilingual unit studies as instant PDF downloads, each with lesson plans, printables, flashcards and activities you can use alongside Spanish 1 or on their own: Descubre el Mundo de Insectos, El Espacio, Bajo el Mar, Medios de Transporte, La Pascua, Christmas in Chile, Mexico's Independence Day and Viaje a Mexico. Bought separately they come to more than $70; the bundle is $39.99.