ginger, it is normal to react badly to school, honest.I spoke to lots of parents when dd started, most said that their child was absolutely awful when they started school. school and nursery both said that it is normal for them to be tired and stroppy when they start. dd reverted to toddler behaviourr and I have a feeling ds will be appalling.
he is tired and just had enough of being good all day,i have had children just lay down on the floor and go to sleep in the classroom. he has had to learn a lot in the last few days and it is hard work. he has had to learn where things are and what he is allowed to do when. he has had to learn to stop playing in the middle of his game or tidy up his half finished model becaause it is time to do something else. he has had to learn to share with an awful lot more people than at home and nursery. he has had to learn where to go to the loo, when he can go where to wash his hands, whether to line up for lunch straight after or back to the claassroom or maybe straight out to play. he has had to learn where to put his coat, his bag, his pe kit, his water bottle, his book folder, his lunch or his dinner money. he has had to negotiate the big playground, where is he allowed to play, where he should line up, what should he do when the whistle/bell goes. what are the names of the mid-days/other teachers. then there is lunch times and assemblies, all with massive aamount to take on board, and if he forgets it he may get in trouble (even if that is only a reminder from the teacher) it is hardly surprising that he is having melt down after school with all that to take on board.
howeverr, you are not overr protective to try and want to sort this. what was he like as a toddler? was he a biter/kicker/spitter then? can you give him ealierr nights forr a bit. do you give him something to eat the second he walks out of the school door on the way home? can you talk about some of the things that may be worrying him.. toilets/big playground/eating his lunch in time/assembly. can you talk to the teacher about how he is settling in at school? have other children been told off for things and is he now worried that he might get told off? how old is he? if he is summerborn he is going to struggle more than some of the others.