North Lakes is a new development, which some love and some hate, we looked at a few houses on their and thought they were overpriced compared to other areas, however there are a lot of English people living there so it can help with settling in and making new friends. We ended up buying in Bridgeman Downs, which is that bit nearer to the CBD than North Lakes.
There is a least one state school on North Lakes, the one I know off has very big year groups, there is also a private/independent school on North Lakes, however I do not know how good it is.
St Paul' is a private school and is about 10 /15 minutes from North Lakes.
I see your kids are similar ages to mine, my girl is 9 and my boy is 12, if you want to meet up when you get here just send me a private message.