My 4.5yo DD1 started reception in September & since then we have noticed a marked deterioration in her behaviour. She has become rude, defiant & disrespectful not only at home but also with her teacher in school. When she's in a mood anything you ask her is met with a scowl & a "No way!", occasionally accompanied with a complete meltdown where she deliberately does things she knows will wind us up & get her punished
. When she's in this mood, no amount of privilege removal will work (in fact, she's giving us things to take away) & she just treats the naughty spot as a joke 
She's been also indulging in a lot of attention seeking behaviour - complaining of a bad belly when she's actually fine, whinging about being hungry or thirsty immediately after eating a big meal, whinging about being tired/cold/hot, arguing with us, bursting into tears at the drop of a hat...
Unfortunately, as DD1 gets the school bus to & from school we don't get to see her teacher very often but if DD1 has had a particularly bad day she will phone us to let us know or slip a note in her bag. Admittedly this has only happened a few times but DD1 comes home very often saying that she's 'been a little bit naughty in school' & put on the naughty spot or lost her playtime (at least she's being honest about it I guess
). Her behaviour was also discussed with us at parent's evening
.
I know all of this is classic attention seeking behaviour but as to how to deal with it - I'm at a loss. She came from a very small, intimate nursery where all the carers were young girls (late teens & early 20s) & more like big sisters to her so I know it must be a big adjustment for her starting school. I want to make some allowances for that but I can't let her carry on with this behaviour.
Also, I can correct the behaviour at home but what about when she comes home & tells me she's been naughty at school (or if there's a letter in her bag off the teacher)? How do I deal with that? I don't want to punish her twice but then I also want to reinforce the teacher's discipline (teacher made a big thing in the parents evening about working together to reinforce each others efforts in disciplining her). I also don't really want to punish her when she's told be she's been naughty as she'll just stop telling me.
Any hints or tips on how to deal with this? I want my lovable, kind, affable little girlie back 