Sorry Angelina, I am just catching up, so commenting a bit late. I just wanted to say how sorry I am that your father did that, I don't think that I could have ever forgiven one of my parent's if they did something like that to me, and for your father to do that to you when he held the position he held, is absolutely awful. I can only hope that you managed to keep some sort of positive relationship with him going forward.
I probably wanted to tell you that I feel for you because of the empathy I am feeling now. My father was a mathematician who went to sleep at night working out formula's backwards eg. the formula for the quadratic equation was easy for him, and he was known to write to Stephen Hawkins on occassions when he didn't agree with him (obviously explaining in great detail the reasons for his disagreement). I have no idea whether either of them was right or wrong as I must be one of the people furthest away from ever being considered a mathematician!
Anyway, I started secondary school in 1969, so close to the time that you did. Maths must have passed me by at junior school, as I had no real idea about it when I went to ss. I seemed to have a brick wall in my head when it came to maths - possibly because my father used to really shout at my (quite a bit older than me) brother when my brother was doing his maths homework, so I was already really scared of the idea of it.
As it happens my Dad didn't shout at me about my maths homework - it was the only homework he supervised helped me with - I presume now that that was because I was a girl and so (obviously erroneously for that reason) didn't expect me to be any good at maths, or it might have been because I was, sadly, his favourite child - he would just try to explain to me the way I should work out any of the mathematical questions.
Unfortunately he never understood just how basic my knowledge of maths was. I could add up and subtract, do long division as long as it was very easy, and I could multiply slowly using my fingers etc (weirdly my infant/junior school never taught us the multiplication table or the alphabet! I knew all the letters in the alphabet, and which were vowels and consonants, but we weren't actually told the order they went in, we certainly didn't sing the alphabet song! I could read from an early age, and it was, and still is a passion of mine. I don't know how I would manage without the world of fiction to escape into (although music is great in that way too).
If you are still reading this Angelina then many thanks, as my English comprehension knowledge is let down by my lack of being able to summarise 🙄 🤭 Anyway (again!), I would nod along as my father was "explaining" my maths homework to me, and he didn't then ask me to explain it back to him, so I used to do exceedingly well in my maths homework - by that I mean I got very good marks for it. I only once had what I considered to be a good maths teacher, so until my mock 'O' levels I was absolutely atrocious at maths, and that was never found out in class because I sat as quiet as a mouse, and the teachers (over the years) probably thought I understood everything because of my homework grades.
When my mock maths results came in the penny must have at least partially dropped, as I was downgraded from the 'O' level class to the C.S.E. class, and that is when I at last got a good maths teacher, who was able to get me up to a good enough standard - in a few months - to get a 2 in my C.S.E. maths exam. I eventually managed to get a 'b' in GCSE maths - many years later - as I wanted to become a nurse, And I needed the GCSE in it to do so. My second, and present, and hopefully until the rest of my life, husband, tutored me for my GCSE exam (I did go to night school as well, but the maths tutor there was the same as most of my other maths teachers at school, and I hardly understood any of it, but when I got home my husband explained it all very patiently to me), and so I got a 'b', and I got to University to study nursing 😊
So, my father never caused me the pain and humiliation in the same way that your father did to you, but he actually didn't do me any favours by giving my maths teachers such an erroneous impression about my abilities. If I had been transferred into the C.S.E. class for maths during my first year of secondary school, and if I had had that same female maths teacher, who knows, I might have even got a 1st in my C.S.E. maths - which in those days was considered to be the equivalent to an 'O' level. How did you do in the end Angelina, did you get your 'O' level in maths, and much more importantly in my opinion, were you ever able to forgive your Dad? I do hope that even if you never forgave him for his dreadful behaviour that night, that you were still able to have a good relationship with him. 💐💐