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  2. Kirkman's schoolgirl problem - Wikipedia

    en.wikipedia.org/wiki/Kirkman's_schoolgirl_problem

    In addition to S(2,3,9), Kramer and Mesner examined other systems that could be derived from S(5,6,12) and found that there could be up to 2 disjoint S(5,6,12) systems, up to 2 disjoint S(4,5,11) systems, and up to 5 disjoint S(3,4,10) systems. All such sets of 2 or 5 are respectively isomorphic to each other.

  3. Crowds (adolescence) - Wikipedia

    en.wikipedia.org/wiki/Crowds_(adolescence)

    The basic, recurring crowd divisions (jocks, geeks, partiers) have been most often studied in predominantly white high schools, but they also exist for minority students. [14] In multiracial schools, students seem to divide along ethnic lines first, then into these archetypical crowds within their own ethnicity.

  4. Adolescent clique - Wikipedia

    en.wikipedia.org/wiki/Adolescent_clique

    Crowd ranking can sometimes change but is generally quite stable across time and schools. [3]: p.162 Part of a clique's popularity status is based on the crowd with which its members associate, thus similarly popular cliques within the same crowd are more likely to move within the hierarchy than are similar crowds within the larger peer context.

  5. Maryland Elementary School Tries To Force Students To Say The ...

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  6. Racial achievement gap in the United States - Wikipedia

    en.wikipedia.org/wiki/Racial_achievement_gap_in...

    The racial achievement gap in the United States refers to disparities in educational achievement between differing ethnic/racial groups. [1] It manifests itself in a variety of ways: African-American and Hispanic students are more likely to earn lower grades, score lower on standardized tests, drop out of high school, and they are less likely to enter and complete college than whites, while ...

  7. Every Student Succeeds Act - Wikipedia

    en.wikipedia.org/wiki/Every_Student_Succeeds_Act

    An inauguration day directive on January 20, 2017, from President Donald Trump's Assistant to the President and Chief of Staff "Regulatory Freeze Pending Review" [37] delayed implementation of new regulations, including portions of the Every Student Succeeds Act. On February 10, 2017, U.S. Secretary of Education Betsy DeVos wrote to chief state ...

  8. Six degrees of separation - Wikipedia

    en.wikipedia.org/wiki/Six_degrees_of_separation

    No longer limited strictly to academic or philosophical thinking, the notion of six degrees recently has become influential throughout popular culture. Further advances in communication technology—and particularly the Internet—have drawn great attention to social networks and human interconnectedness.

  9. Crowd psychology - Wikipedia

    en.wikipedia.org/wiki/Crowd_psychology

    A crowd changes its level of emotional intensity over time, and therefore, can be classed in any one of the four types. Generally, researchers in crowd psychology have focused on the negative aspects of crowds, [11] but not all crowds are volatile or negative in nature. For example, in the beginning of the socialist movement crowds were asked ...