Kids...you will want them to attend ASP or ASL (American School of Paris or London respectively). This way they don't need to adjust to a different style of education and then re-adjust when you return.
Considering the state of the education system here, I don't know that I wouldn't prefer that they see another way of doing things. Going halfway around the world (OK a quarter of the way) and expecting everything to be just like home is why some people hate American tourists. Isn't the fun of world travel supposed to be that it's different?