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2. Unitary method - Wikipedia

   en.wikipedia.org/wiki/Unitary_method

   In elementary algebra, the unitary method is a problem-solving technique taught to students as a method for solving word problems involving proportionality and units of measurement. It consists of first finding the value or proportional amount of a single unit, from the information given in the problem, and then multiplying the result by the ...

3. Proportional reasoning - Wikipedia

   en.wikipedia.org/wiki/Proportional_reasoning

   Most students, including those still at the concrete operational stage, will quickly answer that the father's height must also double. The abstract thought experiment is: "Suppose that one of the variables is doubled in value, how will the other variable change?" If the answer is "double", then this may be a constant ratio problem.

4. Mathcounts - Wikipedia

   en.wikipedia.org/wiki/Mathcounts

   The Math Video Challenge program allowed students in teams of 4 to create a video that explained the solution to a problem from the Mathcounts School Handbook in a real-world scenario. The program was discontinued in 2023, but a similar video project opportunity is offered through the National Math Club.

5. Proportion (mathematics) - Wikipedia

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

   A proportion is a mathematical statement expressing equality of two ratios. [1] [2]: =: a and d are called extremes, b and c are called means. Proportion can be written as =, where ratios are expressed as fractions.

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7. Elementary mathematics - Wikipedia

   en.wikipedia.org/wiki/Elementary_mathematics

   In the United States, there has been considerable concern about the low level of elementary mathematics skills on the part of many students, as compared to students in other developed countries. [14] The No Child Left Behind program was one attempt to address this deficiency, requiring that all American students be tested in elementary mathematics.