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  2. Dolch word list - Wikipedia

    en.wikipedia.org/wiki/Dolch_word_list

    The Dolch word list is a list of frequently used English words (also known as sight words), compiled by Edward William Dolch, a major proponent of the "whole-word" method of beginning reading instruction. The list was first published in a journal article in 1936 [1] and then published in his book Problems in Reading in 1948. [2]

  3. Sight word - Wikipedia

    en.wikipedia.org/wiki/Sight_word

    Sight words account for a large percentage (up to 75%) of the words used in beginning children's print materials. [6] [7] The advantage for children being able to recognize sight words automatically is that a beginning reader will be able to identify the majority of words in a beginning text before they even attempt to read it; therefore, allowing the child to concentrate on meaning and ...

  4. Words in Colour - Wikipedia

    en.wikipedia.org/wiki/Words_in_Colour

    Words in Colour first appeared in 1962, published simultaneously in the UK and US. Later versions were published in French (French: Lecture en Couleurs) and Spanish (Spanish: Letras en Color). [2] Words in Colour is a synthetic phonics system that uses colour to indicate the phonetic properties of letters. [3]

  5. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    An element C of H color is a function from the range of visible wavelengths—considered as an interval of real numbers [W min,W max]—to the real numbers, assigning to each wavelength w in [W min,W max] its intensity C(w). A humanly perceived color may be modeled as three numbers: the extents to which each of the 3 types of cones is stimulated.

  6. The color of a red cape does not enrage a bull. Bulls are not enraged by the color red, used in capes by professional bullfighters. Cattle are dichromats, so red does not stand out as a bright color. It is not the color of the cape, but the perceived threat by the bullfighter that incites it to charge. [30]

  7. Amethyst - Wikipedia

    en.wikipedia.org/wiki/Amethyst

    The biggest factor in the value of amethyst is the color displayed. [41] The highest-grade amethyst (called deep Russian) is exceptionally rare. When one is found, its value is dependent on the demand of collectors; however, the highest-grade sapphires or rubies are still orders of magnitude more expensive than amethyst. [7]