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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. Four-dimensional space - Wikipedia

   en.wikipedia.org/wiki/Four-dimensional_space

   The 4-volume or hypervolume in 4D can be calculated in closed form for simple geometrical figures, such as the tesseract (s 4, for side length s) and the 4-ball (/ for radius r). Reasoning by analogy from familiar lower dimensions can be an excellent intuitive guide, but care must be exercised not to accept results that are not more rigorously ...

4. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   Algebra (and later, calculus) can thus be used to solve geometrical problems. Geometry was split into two new subfields: synthetic geometry, which uses purely geometrical methods, and analytic geometry, which uses coordinates systemically. [23] Analytic geometry allows the study of curves unrelated to circles and lines.

5. Kumon - Wikipedia

   en.wikipedia.org/wiki/Kumon

   All Kumon programs are pencil-and-worksheet-based, with a digital program that started in 2023. The worksheets increase in difficulty in small increments. [9] [10] Psychologist Kathy Hirsh-Pasek says that using such techniques for 2 to 4-year-olds "does not give your child a leg up on anything". [7] One study has observed a high percentage of ...

6. Rotations in 4-dimensional Euclidean space - Wikipedia

   en.wikipedia.org/wiki/Rotations_in_4-dimensional...

   The 5D rotation group SO(5) and all higher rotation groups contain subgroups isomorphic to O(4). Like SO(4), all even-dimensional rotation groups contain isoclinic rotations. But unlike SO(4), in SO(6) and all higher even-dimensional rotation groups any two isoclinic rotations through the same angle are conjugate.

7. Noetic Learning math contest - Wikipedia

   en.wikipedia.org/wiki/Noetic_Learning_Math_Contest

   National Honor Roll: Awarded to the top 10% of participants in each grade category. Honorable Mention: Awarded to students who score in the top 50% of participants in their grade category. [20] [18] School teams can earn the following award: Team Achievement: The top 10% of teams in each grade. [6] [21]