I did really well in school, got a good 2:1 from a top university and then a law degree. I do well at work and am, basically a relatively clever and academic person.
But my god, my son is in year 9 and his maths, physics and chemistry are SO far beyond me! Why? I did fine in them at school so I must have studied them but he’s doing stuff where you could sit me in front of it all day and I would have zero clue.
Other son is in year 7 and I can just about get on with his maths although when he did the 11+ there were probably 8% of the questions that I really struggled with, and the non verbal reasoning was pretty much a mystery to me.