... propelled in partby rapid growth in the size of the labor force. In the coming years, labor force growth will slow sharply as the baby boom generation retires. Furthermore,improving the quality of ... rose rapidly in the 1970s and 1980s beforeleveling off in the 1990s, have given rise to an increasing number of single-parent families. Today, 28 percent of children reside in single-par-ent ... othermeasures of school readiness, including social skills,health, and approaches to learning.67Learning is a cumulative process. Many of the building blocks of learning are developed in the...