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  2. National Council of Educational Research and Training

    en.wikipedia.org/wiki/National_Council_of...

    The textbooks are in color-print and are among the least expensive books in Indian book stores. [11] Textbooks created by private publishers are priced higher than those of NCERT. [ 11 ] According to a government policy decision in 2017, the NCERT will have the exclusive task of publishing central textbooks from 2018, and the role of CBSE will ...

  3. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    They are commonly given to students as homework. The second type of math worksheet is intended to introduce new topics, and are often completed in the classroom. They are made up of a progressive set of questions that leads to an understanding of the topic to be learned. [2] Parents also need worksheets. [3]

  4. NCERT textbook controversies - Wikipedia

    en.wikipedia.org/wiki/NCERT_textbook_controversies

    In the Class 7 textbook topic titled “Our Pasts-2”, pages 48 and 49 have been excluded. These pages mentioned “Mughal Emperors: Major campaigns and events.” The deletions also affected Biology and Chemistry textbooks as the theory of evolution and the periodic table were also purged from class 10 NCERT textbooks. [34] [35]

  5. Trigonometry - Wikipedia

    en.wikipedia.org/wiki/Trigonometry

    In the 2nd century AD, the Greco-Egyptian astronomer Ptolemy (from Alexandria, Egypt) constructed detailed trigonometric tables (Ptolemy's table of chords) in Book 1, chapter 11 of his Almagest. [11] Ptolemy used chord length to define his trigonometric functions, a minor difference from the sine convention we use today. [ 12 ] (

  6. Spherical trigonometry - Wikipedia

    en.wikipedia.org/wiki/Spherical_trigonometry

    Text books on geodesy [2] and spherical astronomy [3] give different proofs and the online resources of MathWorld provide yet more. [4] There are even more exotic derivations, such as that of Banerjee [ 5 ] who derives the formulae using the linear algebra of projection matrices and also quotes methods in differential geometry and the group ...

  7. Lesson plan - Wikipedia

    en.wikipedia.org/wiki/Lesson_plan

    A lesson plan is the teacher's guide for running a particular lesson, and it includes the goal (what the students are supposed to learn), how the goal will be reached (the method, procedure) and a way of measuring how well the goal was reached (test, worksheet, homework etc.).

  8. Time book - Wikipedia

    en.wikipedia.org/wiki/Time_book

    Early 20th century the time book has become a regular tool of management, sometimes in the shape of a loose leaf binder. [16] The handling the labor accounts, however, keeps causing great difficulties as Kirkman (1907) explained, and therefor he introduced the track time book.: Track Time (and Distribution) Book, 1907.

  9. Negative number - Wikipedia

    en.wikipedia.org/wiki/Negative_number

    When playing an audio file on a portable media player, such as an iPod, the screen display may show the time remaining as a negative number, which increases up to zero time remaining at the same rate as the time already played increases from zero. Television game shows: Participants on QI often finish with a negative points score.

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