Our expert says:
Stop buying him computer games - he must earn them, and the right to play them, by not lying and by doing his school work satisfactorily. ( I wodner if there is some control code you parents could insert to control when he can or can't access them > )
However, that he can get so busy on the computer shows that he CAN concentrate and HAS intelligence, but he's not applying it to the stuff that really matters. Clearly, from your description, the family have had conflict and problems, which may have affected the kids differently.
Its good that he's seeing a psychologist, but she must be involved in helping you plan how to deal with these learning problems, too. Bullies can of course be problems, but it sounds as though he may be lying about that.
But above all, the boy should see a psychologist, and if he is already doing this, then she ought to be dealing very actively with all these problems, and advising the parents on how to deal with them.
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