In France, the best students go to special preparation schools (Classes préparatoires aux grandes écoles) that are located in highschools. There, they spend 2 (or 3 for the unlucky, they may fail once) years preparing for special ranking exams  (similar to University level 1 & 2 on steroids). On Success, they gain access to the high level french engineer schools (most of those in the fr lib folder).
In France, the best students go to special preparation schools (Classes préparatoires aux grandes écoles) that are located in highschools. There, they spend 2 (or 3 for the unlucky, they may fail once) years preparing for special ranking exams  (similar to University level 1 & 2 on steroids). On Success, they gain access to the high level french engineer schools (most of those in the fr lib folder).

Teachers in highschools do have emails with ac-something subdomain
like : 
ac-nancy-metz.fr 
ac-strasbourg.fr
...