The Most Distant Galaxy in the Universe So Far - Duration: 4:24. SpaceRip 506,555 views
What Is Standards-Based Grading? Standards-based grading, sometimes called proficiency grading, is a method for teachers to measure how students are doing in meeting the learning goals for their grade as determined by their stateâs standards.
A primary standard in metrology is a standard that is sufficiently accurate such that it is not calibrated by or subordinate to other standards. Primary standards are defined via other quantities like length, mass and time. Primary standards are used to calibrate other standards referred to as working standards. See Hierarchy of Standards.