children with cerebral palsy are definitely not commonly having mental retardation. it is found that more than 60% of them are having normal or even above normal intelligence. only thing is that their intelligence is masked because of their motor problem and less interaction with social environment. Most of them try hard to cope with their environment and also have talent and interest in many activity like singing , sculpture playing game like carrom, chess and even some outdoor game requiring limited mobility and many other activity. these children with nearly normal IQ also do much better in schooling because of their concentration which remain unbroken because of limited mobility. severe mental retardation are found only in children with severe disability. Now days we are more focussing on inclusive education in which all these children are allowed to go mainstream schooling, which boost up their confidence and improve their personality tremendously. so we should identify those hidden talent and encourage them that boost up their morale and speeds up recovery along with therapy and other management. it is needed that we should start paying attention to their ability now. more update about latest development in mx of cerebral palsy log to http://www.trishlafoundation.com & you tube trishla foundation cerebral palsy
Cerebral Palsy Treatment India 
My infant son was supposed to be very seriously delayed physically and cognitively due to cp. the doctors told us he wouldn’t be able to do much or learn much. I didn’t listen to them. I still treated him just like any other child. Now he is walking, talking and playing like a normal 1-year-old