9yrold son has a concentration problem, day dreams a lot and becoming a problem at skool\home.takes ages with h\w b\c he thinks about something else.

The most common: Cause of these symptoms is adhd--primarily inattentive type +/- anxiety, depression, learning , emotional, neurological & other medical problems. His pediatrician, a developmental /behavioral pediatrician or child psychiatrist can assess for these. Standardized psycho-educational tests of his attention, active-working memory, academic achievement & executive functions complete the evaluation.