I did middle school training for my degree in Education.There were a few of us who had signed up to do maths as a main subject, but we could not because the maths lecturer was away in Penang! So we did environmental science instead.
It was a college for mature students. My kids were 7 and 9 when I started.
In my first job I did supply for the head of maths at a school and had to teach matrices and vectors. I was one step ahead of the 5th year pupils, year 13, I think they are called now.
Most schools do after school help for parents who want to know more about maths or numeracy. The problem is that the grandparents cannot go as they are usually babysitting. Lots of maths these days is a question of language used as much as the maths content.
At one time I taught adult literacy, and the eyeopener there was the lengths that some parents would go to to hide the fact that they could not read, write, add up or work out bus timetables.
Passports not in the drawer I always keep them in. Turning the place upside down.