Well, back again, glad your son enjoyed the fetes.
This is a bit of a ramble but here goes:
Getting more stroppy around 10 years old? I can definitely relate to that - something about my son moved up a gear when he was 10 - a hint of hormones I think - suddenly he was contradicting everthing I said, arguing for the sake of arguing. If I'm in a good mood this just comes
across as friendly verbal sparring, if I'm in a bad mood, it's irritating uncooperation.
I find ds sometimes delights in verbally (and sometimes physically, I'm sad to say) tripping up his younger brother. DS1 knows just how to wind him up and when ds2 has been bad, ds1 will order him to go his room. I have told ds1 it is not his place to dole out punishments but it falls on deaf ears. He loves playing the older brother and this makes ds2 really mad.
I am finding things work better if ds1 is kept busy with separate activities. This stimulates and tires him out so he is easier company. I also get more one-to-one time with ds 2. At the moment ds1 goes to about 6 different clubs (not every week, we pick and choose - youth club, sports club, drama club etc). He seens to value them more than he did a few years ago. I now never get complaints about his behaviour.
OK I am doing more ferrying around of ds1, but I have cut back on the number of day trips I take both boys on. Suddenly a day at the science musuem with both boys seems like harder work. ds2 and I would have a more relaxed time alone together. I think some of the problem lies in the fact that ds1 is fast outgrowing all things pitched at primary school level. He wants to mix with older children, be more challenged, be physically more active, have more independence. Perhaps your son is feeling this too?
I found a turning point was reached with cubs a year ago - I took scummymummy's fab advice and detached myself from the situation: I told ds1 I could no longer be bothered to take him to cubs as his leader was always drawing me to one side to complain about his behaviour. The leader was not a good one (everyone said he was ineffectual and inexperienced) but I told ds1 wherever the fault lay, I was not interested, I did not care any more. I was simply fed up with being piggy in the middle and unless ds1 sorted it out, I would stop giving him lifts there. It was no longer a 'mummy punishing me' situation - it was
me, as an independent adult, telling ds I could not be bothered with any more hassle on my Tuesday evening.
This line I have found is far more effective. I am taking away a safety net - no longer saying I am punishing you, but it's ok I will still take you to your lessons. I am saying I have looked at this situation, I can't be bothered with it any more, convince me otherwise it is worth my while. I have tried this approach on other issues and it works.
For helping in the house, depending on your viewpoint, I 'take the line of least resistance' or I 'play to ds1's strengths'. Ds1 loves cooking-so I get him cooking ror him and his brother, making breakfasts, helping me cook bigger meals. He also likes a clean house, so when I am in the middle of a panic clean due to guests arriving, I can usually rely on him to help me dust, polish and hoover.
He doesn't like washing up, will just about do it if he has cooked but otherwise no. He hates cleaning his room, so I do it . So I don't really
force him to do the jobs he hates, as long as he does the jobs he likes(ones that are helpful to me).
If there is a tangible deadline - guests coming, us leaving the house to get a train, this helps him concentrate his efforts. No deadline and
it's much, much harder to get him focussed on work.
I have made him help much more in the run up to leaving the house. He knows it is no longer enough to simply get himself dressed and look on while I run around madly filling up drinks bottles, collecting coats, turning off lights etc.He is expected to help and if he doesn't gets shouted at. I expect him to get himself ready well before we leave, so he can help me more. I have said on occasion, unless you do 'A B and C' I can't be bothereed to take you out. This works (unless it's a situation where I have to take him with me).
We do give him some money if he has done very well at school - if it means he has had to work hard, as in the preparation he did for the 11+. But I never give him money for doing day to day household chores - washing up, etc as I've told him doing this is a normal part of family life.
He never forgets his bookbag and all his school paperwork is inside it. I don't put this down to his powers of organisation, I put this down to the school. I think teachers insist all children leave school with their bookbags and try to make sure children have all school letters inside. It is very good training for secondary school. If your son is consisently forgetting his bookbag, I think you need to ask his teacher what is the school routine here? Tell them you have a big problem and you can't ensure ds does his projects on time as you never know about them. It's in the teacher's interest to get homework in on time, so hopefully they can do more to ensure your son leaves with all his stuff. If the bag comes back daily you could the have a home school book, with notes for your son to remember to bring back his sports kit. The teacher could check it over and if no kit has arrived home, punish ds in school. Being shown up at school in fornt of his friends for forgetting to bring home his dirty kit 3 days in a row might make your ds less forgetful? And tell your ds how much he will need to remember at secondary school with the gib kids - all the homework, the books for different classes etc - and how much less patient his teachers will be if he keeps forgetting stuff. Lay it on thick, tell him it's part of growing up.
I do all the above and still my son isn''t as organised and considerate as I would like him to be, but as tactics go, these are the most effective for us.