I have a 12 year old son that is the same way and did the same thing took a lot of things away. But if you take "everything" away what do they have to lose then. They will just do the opposite what you want because they have nothing to lose anymore if that makes sense.
I have been told it is a phase, at this age they don't care much about anything but socializing with friends. So the back talking starts, school grades go down. I wish I know how to change that. I just told him if he fails any courses his social life will change big time.
Teacher say he is bright becasue he can still just pass his test with out studying , so she said can you imagine if he did pick up the book and study.
Can't wait to hear what people suject because I have tried everything too. They just do not care....I get that back talk all the time.."I don't care mom!"
This is exactly right! In the first quarter of this school year, my honor roll student was messing up big time - two F's, a D or two, mostly C's, and maybe one B.

I was horrified! DH and I do not pay him for grades, but his dad and grandma do. The monetary reward was part of why he got back on track (it wasn't new, but he did miss getting the money!), but also a couple other things.
One, I scared him into believing he *would* be repeating 7th grade if he didn't get at least C's. (they actually allow D's, but to me that is NOT a passing grade!

)
And two, we grounded him from all "screen time", meaning video games, TV, and computer, until he could prove that he was getting everything in on time. His problem was the he was just choosing not to do the work, and telling us he didn't have any homework. He would do all the little 5 & 10 point assignments and get full points, and then he wouldn't do the big projects, which would be worth as much as 100 points sometimes. It was horrible!
He has always resisted using a planner, but we finally had a big meeting with several of his teachers together, and we all convinced him that he was going to need to start using a planner, and we taught him to write the assignment in on the due date, cross it off when done, and write "TI" next to it when he acutally turned it in. When this didn't quite fix the problem completely, we also temporarily required him to ask the teacher to initial the planner when he turned it in (they all agreed to do this beforehand). Then we knew for sure, every single day, if his stuff was turned in on time. We also have access to his grade/assignment info online, so we were able to compare his planner to that, and make sure everything matched up.
Once he was back on track with completing assignments and turning them in on time, we gradually started to give him back his screen time, until he was back to his full daily alloted time again. It took about 3 weeks of everything turned in on time before we'd let him back on, but at least he knew there was hope for him to get it back as long as he was staying on track. This is important - they need to know there is something "in it" for them - otherwise, like NAB said, they have nothing to "lose".
Now I'm not saying this is what will solve the problems for everyone out there, but it has been a huge success for us - he was back on the B honor roll for last quarter, and I think his grades *might* be good enough for A honor roll in the quarter that ends tomorrow.
