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A. Systems
By the end of 5th grade, students should know that:
- In something that consists of many parts, the parts usually influence one another.
- Something may not work as well (or at all) if a part of it is missing, broken, worn out, mismatched, or misconnected.
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B. Models
By the end of 5th grade, students should know that:
- Seeing how a model works after changes are made to it may suggest how the real thing would work if the same were done to it.
- Geometric figures, number sequences, graphs, diagrams, sketches, number lines, maps, and stories can be used to represent objects, events, and processes in the real world, although such representations can never be exact in every detail.
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C. Constancy and Change
By the end of 5th grade, students should know that:
- Some features of things may stay the same even when other features change.
- Things change in steady, repetitive, or irregular ways or sometimes in more than one way at the same time.
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D. Scale
By the end of 5th grade, students should know that:
- Almost anything has limits on how big or small it can be.
- Finding out what the biggest and the smallest possible values of something are is often as revealing as knowing what the usual value is.
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