Before the name change, the National Arborist Association had put out a home study program for professional arborists called ... "Basic Arboriculture" manual #1 and Advance Arboriculture. It was two huge folders books with about 16 chapters total if I remember correctly. You had to complete the first manual with multiple-choice questions then buy the second one to continue, The NAA never attended to classified this as certified but was more of a recognition of some sort and those who passed were given a plaque, ID card along with some other things which I don't remember. As I understand it, TCIA are working on this same program but are upgraded it to their standards and should be up and running soon, I'm just surprise no one has any info on it.