Statistics show that a majority of kids attend at least one year of preschool: According to the National Institute for Early Education Research (NIEER), more than two-thirds of 4-year-olds and more than 40 percent of 3-year-olds were enrolled in a preschool in 2005. "Children who attend high-quality preschool enter kindergarten with better pre-reading skills, richer vocabularies, and stronger basic math skills than those who do not," says NIEER director W. Steven Barnett, PhD.
