Everything you need to understand or teach Gulag by Anne Applebaum.
Gulag: A History is an account of the Soviet Russian Gulag labor camps during the twentieth century and discusses what life was like within the camps for prisoners. Applebaum makes extensive use of recently opened Gulag archives, memoirs, interviews, and other official documents to narrate this history.
The first section of the book describes the origins of the Gulag from the Bolshevik Revolution through the Great Terror of the late 1930's...