According to their website, The Institutes for the Achievement of Human Potential is a nonprofit educational organization that serves children by introducing parents to the field of early child development. They offer courses for parents at their campus.
I read "What to Do About Your Brain-injured Child", written by Glen Doman who founded "The Institutes" in 1955. I found some of the concepts in the book useful, such as patterning. The program they typically recommend is very time and energy intensive, which isn't for everyone.