I had to do maths and only maths for two terms in order to just pass maths for my Oxford School Certificate. I.e that would approximate to O-level.
I enjoyed the language of Euclid but for some reason, maybe an indisciplined nature , I was bad at calculating.
What to do with immigrants? - ask Shakespeare
Reducing contact because my heart just isn't in it.
"Old fashioned" expressions that young people have never heard.
Fitting fair isle patterns or cables into the number of stitches you have. Understanding 3 dimensional shapes so you can make fingers in gloves or turn a heel properly in socks.