Match similar objects (e.g., putting all the toy cars together or lining up plates on a table).
Sort objects by a single attribute (e.g., ordering fire trucks from shortest to longest or ordering rocks from smooth to rough).
Sort objects according to two different characteristics and describe a sorting strategy (e.g., sort crayons by color and size, “Here are the big red ones and there are the little blue ones”, or sort blocks by shape and color, “These are all yellow triangles and these are the green rectangles”).