These albums are a written representation of the Montessori prepared environment for the second half of the first plane of development - ages 2 1/2 - 6.
Keys of the World albums are AMI-style with light modification for homeschool use. AMI is keys-based: we provide the children with a strong foundation and a basic framework, leaving a lot of time and space and many invitations for further exploration and personal discovery, so that the structure of the child's own development is truly his own.
The language album uses the original Montessori exploration of language as summarized by Muriel Dwyer in her booklet. This is NOT the pink/blue/green system.