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  2. Dyscalculia - Wikipedia

    en.wikipedia.org/wiki/Dyscalculia

    Most adults with dyscalculia have a hard time processing math at a 4th-grade level. For 1st–4th grade level, many adults will know what to do for the math problem, but they will often get them wrong because of "careless errors", although they are not careless when it comes to the problem.

  3. Ages of Three Children puzzle - Wikipedia

    en.wikipedia.org/wiki/Ages_of_Three_Children_puzzle

    The Ages of Three Children puzzle (sometimes referred to as the Census-Taker Problem [1]) is a logical puzzle in number theory which on first inspection seems to have insufficient information to solve. However, with closer examination and persistence by the solver, the question reveals its hidden mathematical clues, especially when the solver ...

  4. Reasoning Mind - Wikipedia

    en.wikipedia.org/wiki/Reasoning_Mind

    Reasoning Mind is a non-profit organization that develops computer-based math curricula and works with schools to implement them in classrooms. [1] In addition, Reasoning Mind provides professional development to teachers using the program. The organization works closely with partner schools to help them achieve a successful implementation.

  5. Three-part lesson - Wikipedia

    en.wikipedia.org/wiki/Three-part_lesson

    The role of the teacher is to "get students mentally prepared to work on the problem". [ 1 ] Marian Small , a proponent of a constructivist approach to mathematical instruction, provides an example of an inquiry-based question from which a three-part lesson could be created: "one bus has 47 students in it; another has 38.

  6. Third grade - Wikipedia

    en.wikipedia.org/wiki/Third_grade

    In mathematics, students are usually introduced to multiplication and division facts, place value to thousands or ten thousands, and estimation.Depending on the elementary school, third grade students may even begin to work on long division, such as dividings in the double digits, hundreds, and thousands.

  7. Guess 2/3 of the average - Wikipedia

    en.wikipedia.org/wiki/Guess_2/3_of_the_average

    In game theory, "guess ⁠ 2 / 3 ⁠ of the average" is a game where players simultaneously select a real number between 0 and 100, inclusive. The winner of the game is the player(s) who select a number closest to ⁠ 2 / 3 ⁠ of the average of numbers chosen by all players.

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