Constructivism is a child-centered approach to education where students actively construct their own understanding and knowledge through experiences and reflection. The 5 E's model is used: Engage, Explore, Explain, Elaborate, and Evaluate. In each stage, students build upon prior knowledge through hands-on activities, group work, and applying their understanding to the real world. The teacher acts as a guide, assessing student learning throughout to adapt their instruction to meet individual needs.