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"There are truly two different things: knowing and believing that you know. Science consists in knowing; in believing that you know lies ignorance."- Hipocrates

Mathematics


Kahan Academy
Cy Math
Education
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mathoverflow
  • Yarn

    • Chemistry


    Phet Colorado(laboratory)
    Quifácil

    Physics


    Phet Colorado(laboratory)
    Physics Classroom
    fisicaexe

    History

    Toda a matéria
    Caderno educação
    historyonthenet

    Biology

    sciencenotes
    libretexts
    sciencecourseware (laboratory
    biologycorner (labory+teory)

    Geography

    WorldGeographyGames
    Exerciciosweb
    Só Geografia

    English

    Perfect English Grammar
    Englisch-hilfen

    Portuguese language

    Caderno de Educacao
    Read Brazilian Portuguese

    Philosophy

    Toda a Matéria
    Fun Philosophy Lessons

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