This resource guide provides a brief overview of the Early Childhood Longitudinal Study, Kindergarten Class of 1998-99, Kindergarten-Eighth Grade Full Sample (ECLS-K K-8) and specific instructions for obtaining the ECLS-K K-8 dataset, which you can download to your own computer. It also provides guidance in obtaining access to additional restricted-use data. ECLS-K users should refer to the User Guide, which provides greater detail on the topics discussed.