It’s the shift from compulsory education to elective. You’re now in school because you want to be, not because you have to be. The attitude of teachers changes a lot.
In my school, it also shifted from a school uniform to “business”. It felt like an epic transformation.
My favorite is when Brits stay stuff like “entering sixth form”. Makes them sound like transformers or Pokemon or some other epic transformation.
It’s the shift from compulsory education to elective. You’re now in school because you want to be, not because you have to be. The attitude of teachers changes a lot.
In my school, it also shifted from a school uniform to “business”. It felt like an epic transformation.