A few readings, and couple of short video clips:

• CORE, The Freedom Riders
• Chronology of the Freedom Rides
• W Mahoney, In Pursuit of Freedom, Liberation, Sept 1961
• PBS, Freedom Riders, three clips:
  • The Tactic (4:55)
  • The Strategy (4:57)
  • The Fresh Troops (4:15)
• Gallup poll on civil rights, pp. 3-4

There are other clips from Freedom Riders worth checking out, too.