History of Psychology. This timeline from APA explores key events in the history of psychology. It is included in the Online Psychology Laboratory from APA.
History of Psychology: Timeline, Contemporary Foundations. From Annenberg Learner "Discovering Psychology: Updated Edition.
This timeline from the APA Women's Programs Office, Psychology' Feminist Voices, and the Cummings Center for the History of Psychology, highlights achievements of women of color in psychology.
Milestones in Neuroscience Research. By Eric Chudler, PhD from the University of Washington and referenced by the Society for Neuroscience.
American Educational History: A Hypertext Timeline. By Edmund Sass, EdD.
Only a Teacher: Teaching Timeline. From PBS.org.
Timeline of Sociology. From Wikipedia it is organized by decades.