Thanks Johnny – I’ve taken the liberty of fixing that typo (so commenting to be clear that you spotted it first!).

I was maybe thinking of the UK THE and Guardian Rankings, which do use a number of sources (including the NSS) in ranking teaching quality. But the issue remains: if the problem is with the ranking systems either change the rankings or do a better job in explaining what is wrong with them… don’t rush through expensive, harmful and half-baked nonsense like “learning gain” or TEF.