NSES Content Standard E
Science and Technology: Abilities of technological design Grades K-4, page 137 Evaluate a product or design. Students should evaluate their own results
or solutions to problems, as well as those of other children, by considering
how well a product or design met the challenge to solve a problem. When
possible, students should use measurements and include constraints and
other criteria in their evaluations. Students should modify designs based
on the results of evaluations.
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