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2. Investigations in Numbers, Data, and Space - Wikipedia

   en.wikipedia.org/wiki/Investigations_in_Numbers...

   Investigations was developed between 1990 and 1998. It was just one of a number of reform mathematics curricula initially funded by a National Science Foundation grant. The goals of the project raised opposition to the curriculum from critics (both parents and mathematics teachers) who objected to the emphasis on conceptual learning instead of instruction in more recognized specific methods ...

3. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   The term algebra is derived from the Arabic word al-jabr meaning 'the reunion of broken parts' that he used for naming one of these methods in the title of his main treatise. [31] [32] Algebra became an area in its own right only with François Viète (1540–1603), who introduced the use of variables for representing unknown or unspecified ...

4. Area of a triangle - Wikipedia

   en.wikipedia.org/wiki/Area_of_a_triangle

   The area of a triangle can be demonstrated, for example by means of the congruence of triangles, as half of the area of a parallelogram that has the same base length and height. A graphic derivation of the formula T = h 2 b {\displaystyle T={\frac {h}{2}}b} that avoids the usual procedure of doubling the area of the triangle and then halving it.

5. Principles and Standards for School Mathematics - Wikipedia

   en.wikipedia.org/wiki/Principles_and_Standards...

   The Principles and Standards for School Mathematics was developed by the NCTM. The NCTM's stated intent was to improve mathematics education. The contents were based on surveys of existing curriculum materials, curricula and policies from many countries, educational research publications, and government agencies such as the U.S. National Science Foundation. [3]

6. Area - Wikipedia

   en.wikipedia.org/wiki/Area

   In addition to its obvious importance in geometry and calculus, area is related to the definition of determinants in linear algebra, and is a basic property of surfaces in differential geometry. [8] In analysis , the area of a subset of the plane is defined using Lebesgue measure , [ 9 ] though not every subset is measurable if one supposes the ...

7. Cat Mom's Snow Day Enrichment for Her 2 Kitties Couldn't Be ...

   www.aol.com/cat-moms-snow-day-enrichment...

   You have to give it to cat owners, they always come up with creative ways to keep their fur-babies entertained. Angie's plan to bring the snow day inside was paw-sitively brilliant.. Related: Cat ...