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  2. Mental abacus - Wikipedia

    en.wikipedia.org/wiki/Mental_abacus

    Mental abacus. The abacus system of mental calculation is a system where users mentally visualize an abacus to carry out arithmetical calculations. [1] No physical abacus is used; only the answers are written down. Calculations can be made at great speed in this way.

  3. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    Trachtenberg system. The Trachtenberg system is a system of rapid mental calculation. The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Ukrainian engineer Jakow Trachtenberg in order to keep his mind occupied while being in a Nazi concentration ...

  4. Kindergarten - Wikipedia

    en.wikipedia.org/wiki/Kindergarten

    Denmark. Kindergarten (børnehave) is a day care service offered to children from age three until the child starts attending school. Kindergarten classes (grade 0) were made mandatory in 2009 and are offered by primary schools before a child enters first grade.

  5. Wide Range Achievement Test - Wikipedia

    en.wikipedia.org/wiki/Wide_Range_Achievement_Test

    The Wide Range Achievement Test, currently in its fifth edition (WRAT5), is an achievement test which measures an individual's ability to read words, comprehend sentences, spell, and compute solutions to math problems. [1] The test is appropriate for individuals aged 5 years through adult. The WRAT5 provides two equivalent forms (Blue and Green ...

  6. Kindergarten readiness - Wikipedia

    en.wikipedia.org/wiki/Kindergarten_readiness

    Kindergarten readiness. American Kindergarten students listening during story time. Kindergarten readiness refers to the developmental domains that contribute to children's ability to adapt to the kindergarten classroom, which is often a new and unfamiliar environment. There is no single agreed upon definition of Kindergarten readiness.

  7. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    Mental calculation has long been a component of mathematical education. Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies (such as pencil and paper) or devices such as a calculator. People may use mental calculation when computing tools are not available, when it is faster than ...

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