Piaget
Vygotsky
Bronfenbrenner
100

infants begin to learn about the world around them through senses and motor skills 

What is the Sensorimotor stage?

100

Grows a child's cognitive development 

What is play?

100

A person's personal environment. Their home life and family relations for example. 

What is a microsystem?
200

In this stage of cognitive development, a child uses pretend play. They are also considered egocentric.  

What is the preoperational stage?

200

This age group can can accomplish more  with the assistance from someone with more knowledge than themselves. 

What are children? 

200

Connecting environments  

What is the mesosystem?

300

When critical thinking and math skills emerge. Egocentric though begins to devolve.

What is the concrete operational stage? 

300

This developed in the first few years of life according to Vygotsky

What is thought and language? 

300

Social and cultural value.

What is macrosystem?

400

When abstract thinking and moral reasoning emerge 

What is the formal operational stage?

400

Vygotsky's theory suggests this begins with social activities.

What is mental process? 

400

These change over time. These can be any of the child's environments or out side factors that change. 

What is a chronosystem?