Virginia Tech
Virginia Cooperative Extension: Publications: Adolescent Growth and Development
During adolescence, teens begin to change physically, cognitively, and psychosocially in preparation for adulthood. Comprehensive article, aimed primarily at an adult readership, describes how adolescents develop.
University of Manchester
Children's University of Manchester: Teeth and Eating: Tooth Timeline
Illustrated explanation of a basic change in humans as we grow: the maturing of our teeth.