The Rise and Fall of Jim Crow. A Century of Segregation I PBS
http://www.pbs.org/wnet/jimcrow/segregation2.html
This site is highly recommended for teachers to put the events of this lesson plan into a larger societal context. It features a timeline highlighting historical events regarding segregation and civil rights [e.g. Emancipation Proclamation (1863), Plessy v. Ferguson (1896), and Brown v. Board of Education (1954)], including Jackie Robinson's feat of playing in the major leagues and breaking a color barrier in baseball (1947).
Referenced in:
Baseball In Pennsylvania
On the Other Side of the Color Barrier: Segregation and the Negro Leagues