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  2. RYB color model - Wikipedia

    en.wikipedia.org/wiki/RYB_color_model

    RYB (an abbreviation of redyellowblue) is a subtractive color model used in art and applied design in which red, yellow, and blue pigments are considered primary colors. [1] Under traditional color theory , this set of primary colors was advocated by Moses Harris , Michel Eugène Chevreul , Johannes Itten and Josef Albers , and applied by ...

  3. Color difference - Wikipedia

    en.wikipedia.org/wiki/Color_difference

    As most definitions of color difference are distances within a color space, the standard means of determining distances is the Euclidean distance.If one presently has an RGB (red, green, blue) tuple and wishes to find the color difference, computationally one of the easiest is to consider R, G, B linear dimensions defining the color space.

  4. STAR (software) - Wikipedia

    en.wikipedia.org/wiki/STAR_(software)

    STAR Reading, STAR Early Literacy and STAR Math are standardized, computer-adaptive assessments created by Renaissance Learning, Inc., for use in K–12 education. Each is a " Tier 2 " assessment of a skill (reading practice, math practice, and early literacy, respectively that can be used any number of times due to item-bank technology.

  5. Subtractive color - Wikipedia

    en.wikipedia.org/wiki/Subtractive_color

    RYB (red, yellow, blue) is the traditional set of primary colors used for mixing pigments. It is used in art and art education, particularly in painting. It predated modern scientific color theory. Red, yellow, and blue are the primary colors of the RYB color "wheel". The secondary colors, violet (or purple), orange, and green (VOG) make up ...

  6. Manipulative (mathematics education) - Wikipedia

    en.wikipedia.org/wiki/Manipulative_(mathematics...

    For example, three green triangles make a red trapezoid; two red trapezoids make up a yellow hexagon; a blue rhombus is made up of two green triangles; three blue rhombi make a yellow hexagon, etc. Playing with the shapes in these ways help children develop a spatial understanding of how shapes are composed and decomposed, an essential ...

  7. Color wheel - Wikipedia

    en.wikipedia.org/wiki/Color_wheel

    An analogous color scheme is made up of colors next to each other on the wheel. For example, red, orange, and yellow are analogous colors. Monochromatic colors are different shades of the same color. For example, light blue, indigo, and cyan blue. Complementary colors are colors across from each other on a color wheel. For example, blue and orange.

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