Key Understandings Key Understandings about Aging Students in general need practical understanding of aging that is applicable to daily life, but not specialized technical information. Educators can integrate these key aging-related concepts within appropriate disciplines and grade levels. The age structure of different populations varies historically and geographically. The older population is increasing. The older population is becoming older.
Older women outnumber older men.
The older population is becoming more ethnically diverse. Life expectancy increased dramatically in the twentieth century. Continued gains in life expectancy are not guaranteed. Physical and Biological Aspects of Aging Aging-related physical change is not as important as we once thought. Physical aging is an inevitable, multifaceted process.