1. For teaching ancient civilizations,teacher arranges for the students to undertake an archaeological dig in a large sandbox.As the student find different objects,the teacher introduces classifying techniques.The students are encouraged to (1)set up a group museum by developing criteria and choosing which objects should belong,and (2)collaborate with other students who worked in different quadrants of the dig.Each group is then asked to develop theories about the civilizations that inhabited the areThis teaching can be called as