DS has been struggling in maths since Primary School. Finally this year, he's in Yr9, they have different groups for maths and he said he's in the dumb group. He said though that he likes maths because he is starting to understand, this was last week. Tonight I asked him how is maths going, he said good but I don't do any work because the teacher doesn't care . I tried to explain to him that if he doesn't do the work, he won't improve, he said if the teacher doesn't care why should I. I then said to him that if he improves his grades by mid year I will repair his phone for him, he has a touch phone and the screen broke, he was to save his pocket money to pay $180. He actually said yeah mum I will try my best to improve. Is it wrong to bribe your child like this?