I have never understood why we keep most kids grouped by age throughout their education. In my opinion, standardized testing is most useful in a situation wher

I have never understood why we keep most kids grouped by age throughout their education. In my opinion, standardized testing is most useful in a situation where a very limited number of tests are given as 'mile markers' in an educational path. A re-calibration of the scale. No two students learn at the same pace, why force it?