The training of child caregivers is a key factor in the provision of quality day care for young children. However, little is known about what types of training for day care providers are most effective in promoting children's development. Several issues related to training and credentialing need to be addressed: (1) Do day care home providers need the same training as center-based caregivers? (2) Should the training of prekindergarten teachers differ from that of center- or home-based caregivers and, if so, how? (3) Do teachers of 4-year-olds in the public schools need four years of college training or is a degree from a child care training program in a community college adequate preparation? and (4) Should uniform, enforceable regulations be established for credentialing of child caregivers/prekindergarten teachers? Closely tied to credentialing issues is the question of whether preschoolers should be taught using a didactic, teacher-directed approach or a child-centered approach. (NH)