Six-year-old Steven gained an understanding of conservation of number before conservation of liquid.The staggered construction of understanding is referred to as

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Horizontal decalage refers to the uneven progression of understanding conservation in different domains (e.g. number, liquid, mass, etc.). In the example given, Steven understood conservation of number before conservation of liquid, indicating horizontal decalage. Class inclusion refers to understanding that a whole is made up of parts (e.g. understanding that a dog is also an animal), scaffolding refers to support provided to a learner to help them reach a more advanced level of understanding, and deconstruction typically refers to breaking down complex ideas or structures into simpler parts.

Six-Year-Old Steven Gained an Understanding of Conservation of Number Before