Moving to Riyadh in a near futur

Hi,
We will be moving to riyadh in the near futur with two teenagers ( a boy and a girl). I was wondering if someone could tell me how to get the school curriculum in the English and French international school. Does the French or english school have elementary and high school together in the same building? Are the girls segregated from the boys in school?
I would really know how it works because I am a little bit worried .
Thank you for helping!