She'll probably take it in her stride far more than you will :-). If she's been to nursery, toddler groups and all the usual things, she'll be well prepared anyway. If you know any parents with children who are starting at the same time, it might be worth inviting them round or meeting them somewhere. Mine all started fine and had a bit of a wobble maybe the second or third week when the novelty wore off a bit, but the schools are very aware and practised at reassuring them. Let her try on her uniform and PE kit etc, so she's familiar with it.