It would be better to see a breakdown of the 35% of achieved 3 or more Highers. Obviously there would be issues re privacy etc there.
Howabout has explained better than me how there are different ways to look at the stats.
I do know that over 26% of pupils at ds' school get 5 or more Highers. Also over 25% get at least one Advanced Higher. I also came across one anomaly when trying to look at the raw data: in many of the spreadsheets, the "latest & best" result is counted. So if someone does an Advanced Higher, then only the Advanced Higher will be counted when looking at how many qualifications at any level that leaver has achieved by the time they left school
So for lazy analysts, schools offering lots of Advanced Highers (and the pupils passing them) will look as if they are not getting a high percentage of Leavers with Highers 
The school performs above "expectation" (according to SIMD/FSM - which apparently has historically been understated as Govanhill has only recently been recategorised as SIMD1) for all the categories except I think the bottom 20% where the % going to "positive destinations" is slightly lower than they would want it to be. (Obviously the target is 100%
- assuming that all the kids who started school are still there when they reach school leaving age)
Percentages are, I think based on the S3 cohort - but with many transient pupils (asylum seekers, Roma), then almost immediately you are not starting from a base of 100.
The Parent Council fundraises so that it can provide an Achievement Fund for the school to ensure that no pupils misses out on educational opportunities due to lack of funds (eg Duke of Edinburgh, school trips amongst other things). I'm sure other parent councils do the same - but I don't have experience of them.
Ds ( yes, nice middle class boy
) has friends in his top sets who are not as comfortably off. It's good for him to see that not everyone is as fortunate as him. He has many Muslim friends - some well off, some not.
The children I see at other local schools are also encouraged to do well.
As an aside (and dig at myself), I did have to laugh internally when ds recently said he was "mortified" at the way he had just spoken to me. I had to restrain myself from complimenting his English while accepting his apology - but I did give a mental "tick" to his English teacher 
