Which Early Childhood setting follows closely to Montessori theory, Naeyc accredited, childcare, first grade, preschool or primary. and then i have to give an example thanks.
NAEYC accredidation is for Birth through Kindergarten. So that rules out some of your options.
Most Montessori schools are Preschool and Kindergarten (3-6 years old). However, it is by no means limited there. Montessori schools currently are available for Birth through High School.
I guess I don't understand the question. Are you supposed to find Montessori Schools in your area that fit those qualifications? If you are, take a look at the following websites:
http://www.amshq.org/ (American Montessori Society)
http://www.montessori-ami.org/ (Association Montessori Internationale)
Those are the two biggest Montessori groups in the world. They have a list of their member schools on their web site.
If I misunderstood your question, please feel free to ask it again.