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  2. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    Such use was so common that the word "plumbing" derives from plumbum, the Latin word for lead. This was a source of lead-related health problems in the years before the health hazards of ingesting lead were fully understood; among these were stillbirths and high rates of infant mortality .

  3. List of mathematical functions - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_functions

    Thomae's function: is a function that is continuous at all irrational numbers and discontinuous at all rational numbers. It is also a modification of Dirichlet function and sometimes called Riemann function. Kronecker delta function: is a function of two variables, usually integers, which is 1 if they are equal, and 0 otherwise.

  4. Elementary mathematics - Wikipedia

    en.wikipedia.org/wiki/Elementary_mathematics

    Elementary mathematics, also known as primary or secondary school mathematics, is the study of mathematics topics that are commonly taught at the primary or secondary school levels around the world. It includes a wide range of mathematical concepts and skills, including number sense , algebra , geometry , measurement , and data analysis .

  5. Material - Wikipedia

    en.wikipedia.org/wiki/Material

    A material is a substance or mixture of substances that constitutes an object.Materials can be pure or impure, living or non-living matter. Materials can be classified on the basis of their physical and chemical properties, or on their geological origin or biological function.

  6. Image (mathematics) - Wikipedia

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

    The traditional notations used in the previous section do not distinguish the original function : from the image-of-sets function : (); likewise they do not distinguish the inverse function (assuming one exists) from the inverse image function (which again relates the powersets). Given the right context, this keeps the notation light and ...

  7. Virtual reality in primary education - Wikipedia

    en.wikipedia.org/wiki/Virtual_Reality_in_Primary...

    Another experiment was carried out on 91 sixth-grade primary students where they used an augmented reality application "WallaMe" which taught a didactic unit in art education. After analyzing the results, the study found a statistically significant improvements in academic performance, motivation, analysis of information, and collaboration.

  8. Primary school - Wikipedia

    en.wikipedia.org/wiki/Primary_school

    A primary school (in Ireland, India, the United Kingdom, [1] Australia, [2] New Zealand, [3] Trinidad and Tobago, Jamaica, South Africa, and Singapore [4]), elementary school, or grade school (in North America and the Philippines) is a school for primary education of children who are 4 to 10 years of age (and in many cases, 11 years of age).

  9. Elementary - Wikipedia

    en.wikipedia.org/wiki/Elementary

    Elementary, a widget set based on the Enlightenment Foundation Libraries; Elementary abelian group, an abelian group in which every nontrivial element is of prime order; Elementary algebra; Elementary arithmetic; Elementary charge, e, of a single electron; Elementary definition, in mathematical logic; elementary OS, a Linux distribution