DS is 6 and school have mentioned on several occasions he may have a speech problem or impediment of some sort and have referred him to a speech therapist. I'm not exactly sure why, okay he can't pronounce certain sounds very well such as "Th" or "r" or "y" or some times "st". But this is becoming less of a problem with age and other than that he speaks really clearly. I thought maybe I wasn't what they were hearing because I'm so used to his voice but no one seems to have a problem understanding him. Should i take him to a speech therapist and see what they think?