Constructivism is a learning theory that says people actively construct their own understanding and knowledge through experiences and reflecting on those experiences. The 5E model is a teaching approach used in constructivist classrooms that engages students, allows them to explore concepts, explains the concepts, elaborates on the concepts, and evaluates student understanding. An example science lesson uses the 5E model to teach students about immiscible solutions by having them create and clean up a simulated oil spill using various objects to separate oil from water and reflecting on the process.