The largest nonprofit association in the united states representing early childhood education is the a. association for childhood education international. b. national association for the education of young children. c. national education association. d. american federation of teachers.

The National Association for the Education of Young Children (NAEYC) is a large nonprofit association in the United States representing early childhood education teachers, para-educators, center directors, trainers, college educators, families of young children, policy makers, and advocates.[2] NAEYC is focused on improving the well-being of young children, with particular emphasis on the quality of educational and developmental services for children from birth through age 8.

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.