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  2. Unit fraction - Wikipedia

    en.wikipedia.org/wiki/Unit_fraction

    Slices of approximately 1/8 of a pizza. A unit fraction is a positive fraction with one as its numerator, 1/ n.It is the multiplicative inverse (reciprocal) of the denominator of the fraction, which must be a positive natural number.

  3. ILR scale - Wikipedia

    en.wikipedia.org/wiki/ILR_scale

    The Interagency Language Roundtable scaleis a set of descriptions of abilities to communicate in a language. It is the standard grading scale for language proficiency in the United States's Federal-level service. It was originally developed by the Interagency Language Roundtable(ILR), which included representation by United States Foreign ...

  4. Elementary class - Wikipedia

    en.wikipedia.org/wiki/Elementary_class

    While the above is nowadays standard terminology in "infinite" model theory, the slightly different earlier definitions are still in use in finite model theory, where an elementary class may be called a Δ-elementary class, and the terms elementary class and first-order axiomatizable class are reserved for basic elementary classes (Ebbinghaus et al. 1994, Ebbinghaus and Flum 2005).

  5. 1/2 + 1/4 + 1/8 + 1/16 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1/2_%2B_1/4_%2B_1/8_%2B_1/...

    1/2 + 1/4 + 1/8 + 1/16 + ⋯. First six summands drawn as portions of a square. The geometric series on the real line. In mathematics, the infinite series ⁠ 1 2 ⁠ + ⁠ 1 4 ⁠ + ⁠ 1 8 ⁠ + ⁠ 1 16 ⁠ + ··· is an elementary example of a geometric series that converges absolutely. The sum of the series is 1. In summation notation ...

  6. Collaborative learning - Wikipedia

    en.wikipedia.org/wiki/Collaborative_learning

    Collaborative learning. Collaborative learning is a situation in which two or more people learn or attempt to learn something together. [ 1] Unlike individual learning, people engaged in collaborative learning capitalize on one another's resources and skills (asking one another for information, evaluating one another's ideas, monitoring one ...

  7. Elementary and Secondary Education Act - Wikipedia

    en.wikipedia.org/wiki/Elementary_and_Secondary...

    The Elementary and Secondary Education Act (ESEA) was passed by the 89th United States Congress and signed into law by President Lyndon B. Johnson on April 11, 1965. Part of Johnson's "War on Poverty", the act has been one of the most far-reaching pieces of federal legislation affecting education ever passed by the United States Congress, and was further emphasized by the revised No Child Left ...

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