This is because they are frustrated.  They learn slow and they are left behind by their classmates and somebody might bully them, they get pressured and act violently as a reaction even to simple things.

I guess you are right.  When I get frustrated because something takes too long to do, I get agitated too.  But nowadays, there are special education classes for kids specifically with these sorts of disorders.

Low IQ also has a learning disability. They have their own group and they must be taught with their groups. Then gradually they may cope up to a normal way of life.

A  teenager having this difficulties may be given a special attention  and also be given a full of love and understanding.

Teens who have.....      IQ and Aggression should be attended to -  by the love and understanding of the parents and of all the other members of the family. they would not become a social problem if they are treated accordingly, don't let them feel that they are special but treated them naturally but  with love, care and understanding of their performance. 

i guess they need special attention. i suggest they should attend in special classes.

they aren't a big problem at all. yes they may have social problem but if and only you will leave them to be one. treat them like normal people cos they deserve that.