Discuss the gains made by the NAACP during the 1920s through the 1940s. Which cases were important and why? What was the organization working for,

Discuss the gains made by the NAACP during the 1920s through the 1940s.  Which cases were important and why? What was the organization working for, and what were the favored tactics? Also, what did the "Scottsboro Boys" case illustrate, both for blacks in general and regarding the NAACP, and what does the case teach us about the appeal of the Communist Party as an alternative to the NAACP?