This sourcebook contains background readings for teachers and suggests learning activities and resources for teaching about aging at the secondary level. During the lifetimes of present students, the population 65 and over will grow from 11% to 20%. Most children now in school will live well beyond their 70th birthday. There is, therefore, a critical need to prepare this longest-lived generation for life in an older society, to foster more positive attitudes toward older people, and to increase understanding of aging and related issues. The sourcebook is comprised of seven chapters, each of which treats a particular topic. These are: what it means to grow old, attitudes about aging, aging in other times and places, the economics of aging, work and retirement, politics and aging, and longevity and the future. The format of each chapter is essentially the same, containing the following components relating to each topic: a narrative review of current information, a chapter summary in the form of myths and facts, a set of suggested learning activities, a glossary, and recommended readings for further study. Suggested learning activities are many and varied and include having students conduct oral history interviews with an elderly person, select and discuss quotations about aging, analyze advertisements in terms of images of age groups, and analyze statistics. The sourcebook concludes with an extensive bibliography of additional resources including books, articles, curriculum materials, audiovisual resources, government publications, and organizational resources. (Author/RM)