How many learning disabilities are there and how can we recognise them. A child of one my acquaintances has a learning disability as he is not able to remember what he was taught just an hour ago. He claims that he tries his best to learn and remember what he learnt but he is somehow incapable of doing so. I have myself seen him studying hard but there is no retention at all. I feel what he needs at the moment is identification of his learning disability if he has any. How should I convince his parents to atleast consider taking professional help so that he does not lag behind his peers?