Classification & Concept Development

Sorting, grouping, comparing objects and ideas by attributes, and forming categories.

Examples & Achievements

• Sorts objects by color, shape, or size
• Groups animals into categories (farm, wild, pets)
• Understands concepts of same/different
• Orders objects from smallest to largest (seriation)
• Knows about things used every day (money, food, tools)

How to Measure

• Sorts a mixed set of 20 objects into 3+ categories by a single attribute
• Orders 5 objects by size correctly
• Identifies which object does not belong in a set and explains why
• Piaget conservation tasks (number, length) - note most 5-year-olds do not yet conserve