The Origin of IBL
First ideas on science instruction were constructed on laboratory experiments. These ideas included the activities that conducting many firsthand observations, manipulations and knowledge transference. However, In accordance with John Dewey’s views on education (in 1910s), these ideas have varied form knowledge transference to processes or methods to learn. With new perspective, Robert Karplus (In 1950s and 1960s) from the University of California-Berkeley proposed and first used IBL as a model of science instruction named learning cycle. This new science instruction method was suggested the teachers to present science as inquiry and students work in the laboratory before being introduced to the formal explanation of scientific concepts and principals by Educator Joseph Schwab (In 1960s)(NRC, 2000). This method was again formalized by Marshal Herron (In 1971), which developed the Herron scale to evaluate the amount of inquiry within a particular lab exercise. Today, the method is using in science lesson plans follows Bybee's (In 1997) five steps of Engagement, Exploration, Explanation, Elaboration, and Evaluation