Constructivism is a theory that posits that people actively construct their own knowledge and understanding of the world through experiences and reflecting on those experiences. The document discusses how constructivism influences education, with key theorists like John Dewey advocating for experience-based learning where students learn by doing hands-on activities and group work. The document argues that using constructivist teaching methods that engage students in real-world problem solving and collaborative work will create a more effective classroom than traditional lecturing.