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Two girls in Mali use workbooks during their reading class. Workbooks are paperback textbooks issued to students. [1] [2] [3] Workbooks are usually filled with practice problems, with empty space so that the answers can be written directly in the book. More recently, electronic workbooks have permitted interactive and customized learning.
The conventional gradient colors of the rainbow symbol. ROYGBIV is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo, and violet. When making an artificial rainbow, glass prism is used, but the colors of "ROY-G-BIV" are
In India, the birthday of the second president Sarvepalli Radhakrishnan, 5 September, is celebrated as Teachers' Day since 1962. [2] Teacher Appreciation Week decoration at a school in Florida. Many countries celebrate their Teachers' Day on 5 October in conjunction with World Teachers' Day, which was established by UNESCO in 1994. [3]
The rainbow connection number of a graph is the minimum number of colors needed to rainbow-connect , and is denoted by (). Similarly, the strong rainbow connection number of a graph G {\displaystyle G} is the minimum number of colors needed to strongly rainbow-connect G {\displaystyle G} , and is denoted by src ( G ) {\displaystyle {\text{src ...
Former executive producer LeVar Burton announced on his Twitter feed on March 19, 2010, that "Reading Rainbow 2.0 is in the works." [21] In 2011, WNED, the PBS affiliate in Buffalo, New York that owns the Reading Rainbow brand, licensed rights to the brand to Burton and his company, RRKidz. On March 4, 2012, he announced that it was the "last ...
A moonbow (also known as a moon rainbow or lunar rainbow) is a rainbow produced by moonlight rather than direct sunlight. Other than the difference in the light source, its formation is the same as for a solar rainbow: It is caused by the refraction of light in many water droplets, such as a rain shower or a waterfall, and is always positioned ...