My b/g twins were in same Reception Class and are now in separate y1 classes. The change in my dts' behaviour has been remarkable! We had several with his attitude and stropiness in R, whereas Dtd exceeded in most areas. He is now a model pupil, doing really well and no behaviour issues. Better at home too, less whinging. Would you say it's because he's grown ups bit or because he's got some space away from his twin sister? They are good friends 95% of the time. Would be interested to hear other's experiences.