Has anyone put your kids to IS and LS at the same time

I hv a big girl who is studying K2 in a traditional local kindie , as she is a very attentive girl
and follows order very well , she adapts to the LS quite well but I m indeed worried about the burden of local curriculum in primary schools later.
On the other hand . I hv a little boy 1 year old , thinking to put him in IS instead as I always brlieve boys are much more active and should not hv so much boundaries in early childhood , I dun think he can be like my elder daughter who can sit still in class and willing to write , do homework every day. I m also worried that having to push all my kids in academic side , it will be so