13 year old DS has transformed into moody, inconsiderate, lazy, defiant, antisocial lump over the course of past few months.
Main flash points are school work where he puts in minimum effort, is falling well behind his abilities, does not seem to care that he is in danger of failing, resents any efforts to get him to do catch-up work.
But in general the attitude thing is that he doesn't care about being told off, or upsetting anyone. So the only thing we have is rewards and sanctions and that seems to get into a negative spiral of grounding, resentment and attitude.
Any advice from those older and wiser?