Kara’s mother is helping her with a 100-piece puzzle. Kara i…
Kara’s mother is helping her with a 100-piece puzzle. Kara is only four-years-old and the puzzle is too difficult for her. Kara’s mother tells her to find all the corner pieces, then the pieces with the flat sides, and then they group the rest of the pieces together by color. In order to help Kara complete the puzzle, her mother uses the concept of
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