absolutley dont do it in a state school. i tried some years ago with 3 children of a similar age to yours. it was a spectacular disaster. on top of the bullying because they were not portuguese, which was constant, if the teachers turned up for a lesson it was considered a result. they appeared to never bother. my kids were so unhappy we returned less than a year later. we had made a big commitment ,house, work, moving etc and it was destroyed basically by the education system. oh, and the bullying? the teachers laughed, because its funny when your kids are distressed. there was another english child joined at the same time, he got it worse and his language skills were better. i suppose you could try an international school if you have the money? it couldnt be worse than the state school.