oooh! I have a 14 yr old - he still talks to me sometimes :o
I noticed a big sea change at 12, and I had to learn to parent slightly differently - Not ALL the time, cos we were both changing together - but it's a learning curve...
Pick your battles - as someone else said. Teenagers by and large will flex their muscles, but also want a quiet life too. Keep up a bank of goodwill between you - you will both screw up sometimes, and need to draw on it - a good working sense of humour helps.
Listen - might be in the car etc - my own teenager tends to talk to me when I've just told him it's time for bed - like - "I can talk to you now, cos it's on your time, rather than mine.." I find out so much stuff re his life in those crucial 10 minutes before bedtime!
Sometimes, they will tell you stuff about their mates etc - that will make your hair curl
they might be doing it for shock value, judging to see how you react, or genuinely wanting advice - courage mes braves - stay calm, and give advice - making sure they themselves are OK - doing this, opens the gates for them to talk to you about their own stuff...
When they come in through the door from school - don't get on their case straight away i.e "how was school, have you any homework etc" they've had enough for a while, and need to feel part of the family, slip off their coat, and just chill for a few mins - leave it till later on.
I agree with medusa - frontal lobe is still developing - re impulse control and stuff.
Polly - yr 7, for me - was the toughest year - it always felt like I was on his case, and helping to organise him - he was so wobbly as well - slightly aggressive one minute, tearful the next - just overwhelmed really. yr 8 was much better - he'd settled into school etc. now he's yr 9 - he is fairly self reliant - does all his own stuff unprompted with little reminding, he polices himself re: homework, packing bags - I honestly thought he would never get there - I thought yr 7 was tough!
He's basically a good young man though :o he still talks about stuff, he helps with his younger brother (who really looks up to him) he isn't a candidate for feltham young offenders institute yet, and seems quite happy! Mind you - it might all change again next week....
xx