A study documenting the literacy levels of a sample of early care and education providers, examining the relationships among adult literacy level, traditional measures of child care quality, and child language and cognitive outcomes, and analyzing variations in the literacy levels of early care and education providers as it relates to their economic status. The study attempts to replicate the results of a previous study that found provider English literacy to be associated with the quality of the language environment in both child care centers and licensed home-based care in Alameda County, California, using a sample of center and home-based providers whose settings were observed as part of the Child Care and Children's Temperament Study (supplement to the Temperament over Time Study-TOTS).