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.
Primary Standards. A primary standard is a reagent that is extremely pure, stable, it not a hydrate /has no water of hydration, and has a high molecular weight.Examples of primary standards for titration of acids are: 2 CO 3, mol wt.= 105.99 g/mol. primary standard is a reagent that is extremely pure, stable, it not a hydrate /has no water of hydration, and has a high molecular weight. Examples of primary standards for titration of acids are: 2 CO 3, mol wt. = 105.99 g/mol.