Teaching styles and results vary however due to the way data is gathered, averaged and analysed it is always possible to prove one is better than the other. If I could be be bothered (which I can't) I'm sure I could dig out several peer reviewed studies that show the bigger the class and the more standardised the material the better the education level of the population... The small class, focused teaching case falls apart compared to the fixed lesson plans scenario any time the teacher for whatever reason doesn't want to be teaching at that particular point in his/her life (this can be for many reasons ranging from illness, death of a relative all the way to plain overwork or being just an incompetent teacher).
You can determine this from anonymous aggregated data
There isare two things that I would change... 2) the extended performance data needs to be anonymous.
You're mostly agreeing with me here... The larger data set should be anonymous but there are several good reasons that at least some of the data isn't.