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  2. Metrology - Wikipedia

    en.wikipedia.org/wiki/Metrology

    With this instrument, the measurement of mass is no longer dependent on a defined mass standard and is instead dependent on natural physical constants. Metrology is the scientific study of measurement. [1] It establishes a common understanding of units, crucial in linking human activities. [2] Modern metrology has its roots in the French ...

  3. Fifth grade - Wikipedia

    en.wikipedia.org/wiki/Fifth_grade

    Fifth grade. Fifth grade (also 5th Grade or Grade 5) is the fifth or sixth year of formal or compulsory education. In the United States, this is mostly the last grade of primary school, but for some states, it could be the first year of middle school. Primary school generally goes from Kindergarten and ends in fifth or sixth grade.

  4. Gradian - Wikipedia

    en.wikipedia.org/wiki/Gradian

    minutes of arc. 54′. In trigonometry, the gradian – also known as the gon (from Ancient Greek γωνία (gōnía) 'angle'), grad, or grade[1] – is a unit of measurement of an angle, defined as one-hundredth of the right angle; in other words, 100 gradians is equal to 90 degrees. [2][3][4] It is equivalent to ⁠ 1 400 ⁠ of a turn, [5 ...

  5. Length measurement - Wikipedia

    en.wikipedia.org/wiki/Length_measurement

    Length measurement, distance measurement, or range measurement (ranging) refers to the many ways in which length, distance, or range can be measured. The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the speed of light. For objects such as crystals and diffraction ...

  6. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line refers to the tangent of the angle of that surface to the horizontal. It is a special case of the slope, where zero indicates horizontality. A larger number indicates higher or steeper degree of "tilt".

  7. Grading in education - Wikipedia

    en.wikipedia.org/wiki/Grading_in_education

    v. t. e. Grading in education is the application of standardized measurements to evaluate different levels of student achievement in a course. Grades can be expressed as letters (usually A to F), as a range (for example, 1 to 6), percentages, or as numbers out of a possible total (often out of 100). The exact system that is used varies worldwide.

  8. Educational stage - Wikipedia

    en.wikipedia.org/wiki/Educational_stage

    Fifth grade: 10–11 5th grade Sixth grade: 11–12 6th grade Seventh grade: 12–13 1st grade Gymnasium (Lower secondary school) (US equivalent: Middle school) Eighth grade: 13–14 2nd grade Ninth grade: 14–15 3rd grade Tenth grade: 15–16 1st grade Lyceum (Upper secondary school) (US equivalent: High school) Eleventh grade: 16–17 2nd ...

  9. Blaster Learning System - Wikipedia

    en.wikipedia.org/wiki/Blaster_Learning_System

    Math Blaster! 1983. The Blaster Learning System is an educational video game series created by Davidson & Associates and later published by JumpStart (formerly Knowledge Adventure) after the two companies were acquired and merged by CUC Software. The games primarily focused on mathematics, later expanding into language arts and science, and ...