DD was 4 the week before she started reception. In past couple of weeks, her behaviour has been foul; cross, rude, screaming, throwing things. It is behaviour we havent seen much of before, although she had the usual 3 yo tantrums.
Is this a normal reaction to starting school or have we got a real problem on our hands? I am currently putting it down to tiredness, although she was used to doing full days at nursery. We are trying to be firm with her but we are already exhausted and her little sister is missing out on attention 
Please tell me it's normal.....