Sensitive periods are defined as crucial stages in child development (0-6 years) when children are particularly receptive to acquiring specific skills or knowledge

Humans are unique in their ability to adapt any environment to meet their needs, rather than being limited to specific environments

Observation’s aims are to understand/respond to children’s needs and identify/remove obstacles to development

The adult’s primary role is to create an environment supporting the child’s self-construction

Learner’s environment must support natural development rather than just disseminate knowledge

There are 4 planes of development (6 years each) with different physical and psychological needs.

Human tendencies is a toolkit humans use to meet their needs by modifying their environment

A systems theory approach to the interdependence of nature, humanity, and “supranature.”