AP Psychology Resources
Piaget's 4 stages of development are demonstrated in this video.
1 - Sensorimotor
2 - Preoperational
3 - Concrete Operational
4 - Formal Operational
Here are more clips about developmental psychology, including the Strange Situation, Harlow's Monkeys, the Rouge Test, Heinz' Dilemma (Kohlberg's Stages of Moral Development), the Marshmallow Test (delayed gratification), gender, and Erikson's stages of development.
Watch these Crash Course Psychology and Khan Academy videos in order to help you further understand the reading and to review before unit exams and the official College Board AP Exam.