Constructivism view of mathematics

How is Constructivism used in the classroom.
In a constructivist classroom, students are encouraged to use prior experiences to help them form and reform interpretations.
The democratic and interactive process of a constructivist classroom allows students to be active and autonomous learners.
Using constructivist strategies, teachers are more effective.

Constructivism is a theory about how people learn.
Based on the work of developmental psychologists, constructivism contends that people construct meaning through their interpretive interactions with and experiences in their social environments.
It presumes that prior knowledge and experiences play a significant role in learning .