How to motivate a 16 yr. old boy within the public school sytem?

I think a lot of the problem may derive from the way you treat him. I don't mean this in a bad way,it is just that you take him to a bunch of counseling and everything. This may make him feel stupid. Upon feeling stupid, he may decide that he is stupid and therefore does not try anymore. Support him in everything he does. Also, dont compare him to his sisters. When you compare children their self esteem may drop