The Alphabiography Activity was adapted from an activity by Read-Write-Think, a collaborative effort from the International Reading Association and the National Council of Teachers of English.
The Free Child Project—an organization that provides tools and training to help young people engage in social action—has a long list of social justice organizations; It is not exhaustive, but it gives you a good idea of the organizations addressing different needs. The website also includes an online social justice resource for youth called Activist Learning.
Blink, by sociologist Malcolm Gladwell (New York: Little Brown, 2005), is about how and why we pre-judge and what we can do about it.
See more optical illusions at teachnet.com.
The Internet Public Library has a short biography of poet Diane Glancy