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  2. Starfall (website) - Wikipedia

    en.wikipedia.org/wiki/Starfall_(website)

    Starfall was founded on August 27, 2002, [3] by Stephen Schutz, his wife Susan Polis Schutz, and their son, Jared Schutz Polis. [2] [1] Starfall arose from Blue Mountain Arts, a publishing house in Boulder, Colorado founded by Stephen Schutz. Starfall received this name because the founders believed that the name "evoked wonder and delight". [2]

  3. Math Blaster for 1st Grade - Wikipedia

    en.wikipedia.org/wiki/Math_Blaster_for_1st_Grade

    Math Blaster for 1st Grade is a 1999 educational video game in a line of educational products originally created by Davidson & Associates and continued by Knowledge Adventure. The game was re-released in 2000 as Math Blaster Mission 2 .

  4. BrainPop - Wikipedia

    en.wikipedia.org/wiki/BrainPop

    BrainPop (stylized as BrainPOP) is a group of educational websites founded in 1999 by Avraham Kadar, M.D. and Chanan Kadmon, based in New York City. [1] As of 2024, the websites host over 1,000 short animated movies for students in grades K–8 (ages 5 to 14), together with quizzes and related materials, covering the subjects of science, social studies, English, math, engineering and ...

  5. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  6. Subadditivity - Wikipedia

    en.wikipedia.org/wiki/Subadditivity

    By infinitary pigeonhole principle, there exists a sub-subsequence (), whose indices all belong to the same residue class modulo , and so they advance by multiples of . This sequence, continued for long enough, would be forced by subadditivity to dip below the s ∗ + ϵ {\displaystyle s^{*}+\epsilon } slope line, a contradiction.

  7. Interval (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Interval_(mathematics)

    The addition x + a on the number line. All numbers greater than x and less than x + a fall within that open interval. In mathematics, a real interval is the set of all real numbers lying between two fixed endpoints with no "gaps".