The National Household Education Surveys Program (NHES): 2012 restricted-use files include the Early Childhood Program Participation (ECPP) file and the Parent and Family Involvement in Education (PFI) file. The ECPP file contains data about children from birth to age 6 but not yet enrolled in kindergarten in 2012. The PFI file contains data about students enrolled or homeschooled for grades kindergarten through 12 in 2012.