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  2. Third grade - Wikipedia

    en.wikipedia.org/wiki/Third_grade

    In Brazil, third grade is the terceiro ano do Ensino Fundamental I, in this case, children begin their first year of elementary school at age 6 or 7 depending on their birthdate. Therefore, the 3rd year of elementary school is typically for students of 8 (96 months)–9 years (108 months) of age.

  3. Period (school) - Wikipedia

    en.wikipedia.org/wiki/Period_(school)

    A school period is a block of time allocated for lessons, classes in schools. [1] They typically last between 30 and 60 minutes, with around 3-10 periods per school day. However, especially in higher education, there can be many more. Educators determine the number and length of these periods, and may even regulate how each period will be used.

  4. Khan Academy - Wikipedia

    en.wikipedia.org/wiki/Khan_Academy

    Khan Academy is an American non-profit [3] educational organization created in 2006 by Sal Khan. [1] Its goal is to create a set of online tools that help educate students. [4] ...

  5. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    A unit of time is any particular time interval, used as a standard way of measuring or expressing duration. The base unit of time in the International System of Units (SI), and by extension most of the Western world , is the second , defined as about 9 billion oscillations of the caesium atom.

  6. JumpStart - Wikipedia

    en.wikipedia.org/wiki/JumpStart

    Jumpstart Preschool (2nd), Jumpstart First Grade (3rd), Jumpstart Kindergarten (7th), and Jumpstart Second Grade (8th) were among the top-selling home-education software across 13 software retail chains in the week ending May 1, 1999. [36] By 2002, the series sold over 13 million units. [37]

  7. Wikipedia:Manual of Style/Dates and numbers - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

    Similarly, the term "UTC" is not appropriate for dates before this system was adopted in 1960; [2] Universal Time (UT) is the appropriate term for the mean time at the prime meridian (Greenwich) when it is unnecessary to specify the precise definition of the time scale. Be sure to show the UTC or offset appropriate to the clock time in use at ...