Some light geek reading for the new year:
How to Measure Anything: Finding the Value of “Intangibles” in Business 
The book by Douglas Hubbard, follows the premise that:
If it matters at all, it is detectable/observable.
If it is detectable, it can be detected as an amount (or range of possible amounts).
If it can be detected as a range of possible amounts, it can be measured.
If that premise holds, then the same should hold in education as it does in business.
Perhaps we’ll find it is possible to measure items within the Department for Education’s Teachers’ Standards, including the value of ‘good’ in this from 1.7:
maintain good relationships with pupils
 Hubbard, Douglas W. (2010-04-07). How to Measure Anything: Finding the Value of Intangibles in Business (p. 27). John Wiley and Sons. Kindle Edition.