That’s great! But sadly there are many influences on girls and their subject choices apart from the school. The world is full of teachers, parents and other influential adults who think just like this person - that’s advanced maths is not really a suitable subject for girls.
Everywhere they turn, girls see social media which judges their success in life by how they look, how they perform in bed and how attractive they are to men and boys.
There’s not many female influencers who have got there by being good at maths. It’s all about make up, hair and styling or their cute babies.
Many parents expect their daughters to go into traditionally female roles, such as teaching, nursing, healthcare, nursery nursing, retail, admin, hairdressing etc and not nasty Ugly mens jobs like engineering or science where they imagine they will be working with only men and have to wear ugly non sexy clothes and have to travel around the country or even move away from home. And not be feminine, be able to get a man and live around the corner and give them GC.
One of my DDs school friends was very good at Maths and wanted to study it at uni but her parents wanted her to go full time with her YouTube Beauty channel ( seriously !) . The Head of Maths at school intervened and she was allowed to go to uni. But she ended up doing teacher training after she graduated - a job much more in line with her parents expectations of a girls’ job.
My Dd is now at uni and last year her flatmate was final year maths. She ( the flat mate ) had a place on a graduate training scheme with a international accountancy firm to become an actuary. My DD noticed that the friends long term ( from school ) BF was constantly undermining her, saying that it wouldn’t work as a career because what would she do when they had children and she should do teacher training instead . And that it would be so hard with all the exams they would never see each other etc etc.
You will be pleased to know that the Flatmate didn’t bow the pressure from the Bf and is now two years into her training. And she didn’t even move in with the BF so she could do the housework ! Although she’s not dumped him yet 🙁🙁
Its very hard for girls to stand up against the social pressure to not be more clever or earn more than their BF and to always put him first .
So it’s a much bigger picture than what happens in schools. Schools are a part of what it takes to get more girls into STEM but it’s not enough.