The Scottsboro Boys were nine Black teenage boys (the youngest was 13 and the oldest was 19) accused of rape in Alabama in 1931. The landmark set of legal cases from this incident dealt with racism and the right to a fair trial. The case included a frameup, an all-White jury, rushed trials, an attempted lynching, an angry mob, and is an example of an overall miscarriage of justice.
The store in the Mississippi Delta is where black teenager Emmett Till is said to have wolf-whistled at white shopkeeper Carolyn Bryant in August 1955. The 14-year-old was kidnapped, tortured and killed a few days later in a crime that helped set the civil rights movement in motion.
In the 1860s, shortly after the Civil War, a black teenager from Muscatine, Iowa tried to enroll in the local high school, she was denied admission because of her color. Her father sued and won. And when the school board challenged the decision in the Iowa Supreme Court, he won again. Because of those actions, Iowa's schools were desegregated more than 85 years before the rest of the nation officially outlawed school segregation. (There is much more info online).