http://eduscol.education.fr/pid23937-cid52280/le-cycle-termi...
My daughter is in Première ES. It corresponds to a programme covering economics and social sciences. The programme is preset with a few options in there. The official text give the general idea. The programme in Première leads onto the Terminale ES with a Bac ES as the goal.
(The French system is a little more formatted than the English one. It is closer to the Scottish Higher/Lower system in fact. AS or the American programmes...).
In any event, that means the pupil has opted to major in Economics and Social Sciences. (There are still, maths, life sciences, and other stuff too).