Speech disorder are often marked by sound distortions and substitutions Conditions such as stuttering or unusual voice quality may bring undue attention to the speaker. More obvious then other hidden disabilities, the student may become quiet, especially during adolescence, to avoid embarrassment. Early intervention by a language therapist may be very helpful in training appropriate patterns and overcoming the problems. Therapists often can work directly in the classroom as well as provide teachers with information on how they can assist the child in overcoming the problem.