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  2. Proportional reasoning - Wikipedia

    en.wikipedia.org/wiki/Proportional_reasoning

    Reasoning based on relations of proportionality is one form of what in Piaget's theory of cognitive development is called "formal operational reasoning", which is acquired in the later stages of intellectual development. There are methods by which teachers can guide students in the correct application of proportional reasoning.

  3. Circle - Wikipedia

    en.wikipedia.org/wiki/Circle

    A circle circumference and radius are proportional. The area enclosed and the square of its radius are proportional. The constants of proportionality are 2 π and π respectively. The circle that is centred at the origin with radius 1 is called the unit circle. Thought of as a great circle of the unit sphere, it becomes the Riemannian circle.

  4. Proportionality (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Proportionality_(mathematics)

    The variable y is directly proportional to the variable x with proportionality constant ~0.6. The variable y is inversely proportional to the variable x with proportionality constant 1. In mathematics, two sequences of numbers, often experimental data, are proportional or directly proportional if their corresponding elements have a constant ratio.

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    The United States was not surprised by Russia lowering its threshold for a nuclear strike and does not plan to adjust its own nuclear posture in response, the White House said on Tuesday. "As we ...

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    An Alabama A&M football player who suffered a head injury during a game in October has died. The university announced that linebacker Medrick Burnett Jr. passed away on Tuesday evening, a month ...

  8. Standards-based assessment - Wikipedia

    en.wikipedia.org/wiki/Standards-based_assessment

    The purpose of standards-based assessment [5] is to connect evidence of learning to learning outcomes (the standards). When standards are explicit and clear, the learner becomes aware of their achievement with reference to the standards, and the teacher may use assessment data to give meaningful feedback to students about this progress.

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    Coinsurance amounts for hospital and skilled nursing care will also rise by 2.7 percent. Not everyone will feel the pinch. Under Social Security “hold harmless” rules, a person’s Part B ...

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