This brief, one in a series of nine addressing health and safety requirements specified in the Child Care and Development Block Grant Act of 2014, provides an overview of reducing the risk of sudden infant death syndrome (SIDS) and using safe sleeping practices for center-based and home-based child care settings. Licensing administrators and Child Care and Development Fund Administrators may find the brief helpful as they begin to assess and consider future revisions to state standards for both licensed and license-exempt providers. It may also be of value to early childhood and school-age care and education programs and providers in understanding and improving the health and safety of their learning environments. (author abstract)