Cognitive development proceeds through a series of four levels. The first is the single-class level, attained by infants at approximately 1 year of age. At the single-class level, concepts are based on element similarity or convention (for example, images and words for common objects). The second level is the relational level, attained by toddlers…

This essay examines the youth policies and programs of the United Kingdom, Australia, Germany, Sweden, and Norway in an effort to provide examples that may be of assistance in the development of such policies in the United States. Chapter 1 provides an overview of the topic, noting that the focus is on younger adolescents between the ages of 10…