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  2. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    During the COVID-19 pandemic, Glotzbach announced he was opening Quizlet's premium service, Quizlet Teacher, for free to all users who have an account registered as a teacher. [ 19 ] Quizlet made its first acquisition in March 2021, with the purchase of Slader, which offered detailed explanations of textbook concepts and practice problems, and ...

  3. Massive open online course - Wikipedia

    en.wikipedia.org/wiki/Massive_open_online_course

    Poster, entitled "MOOC, every letter is negotiable", exploring the meaning of the words "massive open online course" A massive open online course (MOOC / m uː k /) or an open online course is an online course aimed at unlimited participation and open access via the Web. [1]

  4. Flashcard - Wikipedia

    en.wikipedia.org/wiki/Flashcard

    Flashcards specifically exercise the mental process of active recall: given a question, one must produce the correct answer.However, many have raised several questions regarding optimal usage of flashcards: how does one precisely use them, how frequently does one review, and how does one react to errors, either complete failures to recall or partial mistakes?

  5. Free price system - Wikipedia

    en.wikipedia.org/wiki/Free_price_system

    A free price system or free price mechanism (informally called the price system or the price mechanism) is a mechanism of resource allocation that relies upon prices set by the interchange of supply and demand. The resulting price signals communicated between producers and consumers determine the production and distribution of resources ...

  6. Cash and cash equivalents - Wikipedia

    en.wikipedia.org/wiki/Cash_and_cash_equivalents

    Cash in saving accounts is generally for the saving purposes so that they are not used for daily expenses. Cash in checking accounts allow to write checks and use electronic debit to access funds in the account. Money order is a financial instrument issued by government or financial institutions which is used by payee to receive cash on demand ...

  7. Money - Wikipedia

    en.wikipedia.org/wiki/Money

    A unit of account (in economics) [25] is a standard numerical monetary unit of measurement of the market value of goods, services, and other transactions. Also known as a "measure" or "standard" of relative worth and deferred payment, a unit of account is a necessary prerequisite for the formulation of commercial agreements that involve debt.

  8. Album-equivalent unit - Wikipedia

    en.wikipedia.org/wiki/Album-equivalent_unit

    The standard of an album-equivalent unit in the United States, according to the RIAA. The album-equivalent unit, or album equivalent, [1] is a measurement unit in music industry to define the consumption of music that equals the purchase of one album copy. [2] [3] This consumption includes streaming and song downloads in addition to traditional ...

  9. Kerma (physics) - Wikipedia

    en.wikipedia.org/wiki/Kerma_(physics)

    In radiation physics, kerma is an acronym for "kinetic energy released per unit mass" (alternately, "kinetic energy released in matter", [1] "kinetic energy released in material", [2] or "kinetic energy released in materials" [3]), defined as the sum of the initial kinetic energies of all the charged particles liberated by uncharged ionizing radiation (i.e., indirectly ionizing radiation such ...