I was identified in middle primary school and had to change school to attend another school that had a class for gifted children. I proceeded to take the top grades at that class. I finished primary school close to my 12th birthday, years ahead in basically every category. There was no option to continue in any program for high school so I was sent to the local high school, an impoverished school where the majority of the effort goes to controlling poor behaviour as opposed to education. The solution of the school was to just let me stay in a normal class doing not a great deal of learning for a few years.

I spent some very unhappy years between ~15 and 24. I wish I'd had the chance for a different youth.

EDIT: unhappy, not happy